Google Git
Sign in
apache / ignite-website / c55276b7954c121b3df39f6ceacdb3eb62a60a7b / . / docs / 2.10.0 / perf-and-troubleshooting / memory-tuning.html
blob: 489640b8d82b4c748a457ab77e8bd29f4206257a [file] [log] [blame]
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-61232409-1"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'UA-61232409-1');
</script>
<!-- Yandex.Metrika counter -->
<script type="text/javascript" >
(function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};
m[i].l=1*new Date();k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})
(window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym");
ym(72949126, "init", {
clickmap:true,
trackLinks:true,
accurateTrackBounce:true,
webvisor:true
});
</script>
<noscript><div><img src="https://mc.yandex.ru/watch/72949126" style="position:absolute; left:-9999px;" alt="" /></div></noscript>
<!-- /Yandex.Metrika counter -->
<!-- LuckyOrange code -->
<script type='text/javascript'>
window.__lo_site_id = 284467;
(function() {
var wa = document.createElement('script'); wa.type = 'text/javascript'; wa.async = true;
wa.src = 'https://d10lpsik1i8c69.cloudfront.net/w.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(wa, s);
})();
</script>
<!-- /LuckyOrange code -->
<!-- Bugyard widget embed -->
<script type="text/javascript">!function(){if("function"!=typeof window.bugyard){var a=function(){a.c(arguments)};a.q=[],a.c=function(b){a.q.push(b)},window.bugyard=a;var b=document.createElement("script");b.setAttribute("data-bugyard","610961912c35ff001493163a"),b.setAttribute("async","async"),b.setAttribute("defer","defer"),b.setAttribute("src","https://widget.bugyard.io/bugyard.min.js"),document.getElementsByTagName("head")[0].appendChild(b)}}(); window.bugyard("hideButton"); </script>
<link rel="preload" href='/assets/js/code-tabs.js?1' as="script" crossorigin>
<link rel="preload" href='/assets/js/page-nav.js' as="script" crossorigin>
<link rel="preload" href='/assets/js/docs-menu.js?20201005' as="script" crossorigin>
<style>:root{--gg-red:#ec1c24;--gg-orange:#ec1c24;--gg-orange-dark:#bc440b;--gg-orange-filter:invert(47%) sepia(61%) saturate(1950%) hue-rotate(345deg) brightness(100%) contrast(95%);--gg-dark-gray:#333333;--orange-line-thickness:3px;--block-code-background:rgba(241, 241, 241, 20%);--inline-code-background:rgba(241, 241, 241, 90%);--padding-top:25px;--link-color:#ec1c24;--body-background:#fcfcfc}header{min-height:var(--header-height);background:#fff;box-shadow:0 4px 10px 0 #eee,0 0 4px 0 #d5d5d5;z-index:1}header>.container{display:grid;grid-template-columns:auto auto 1fr auto auto auto;grid-template-areas:'left-toggle home nav ver api search lang';grid-template-rows:40px;flex-direction:row;align-items:center;justify-content:flex-start;padding:12px 20px;max-width:1400px;margin:0 auto}header nav>ul{padding:0;margin:0;list-style:none;display:inherit}header .dropdown{display:none;position:fixed;top:calc(var(--header-height) - 12px);width:auto;background:#fff;box-shadow:0 4px 4px 0 rgba(0,0,0,.24),0 0 4px 0 rgba(0,0,0,.12);border-radius:4px;padding-top:10px;padding-bottom:12px;z-index:2}header .dropdown li{display:flex}header .dropdown a{color:grey!important;font-size:16px;padding-top:5px;padding-bottom:4px}header .menu{border:none;background:0 0;width:40px;height:40px;margin-right:12px;grid-area:left-toggle}header .menu img{width:18px;height:12px}header .search-close,header .top-nav-toggle{background:0 0;border:none;padding:0;width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;color:var(--gg-dark-gray);font-size:26px}header .search-toggle{grid-area:search}header .top-nav-toggle{grid-area:top-toggle}header .home{grid-area:home;margin-right:auto}header .home img{height:36px}header #api-docs{grid-area:api;margin:0;display:flex}header #api-docs .dropdown{padding:.5em 0}header #api-docs a{padding:9px 14px;color:var(--gg-dark-gray)!important;text-decoration:none;white-space:nowrap}header #api-docs .dropdown-item a{font-weight:400;display:block;width:100%;min-width:150px}header #lang-selector li{list-style:none;display:flex;padding:9px 14px}header #lang-selector li a{display:flex;color:#000;align-items:center}header #lang-selector li a span{font-size:10px;margin-left:5px}header #lang-selector li a img{width:25px}header #lang-selector li .dropdown{margin-left:-70px}header #lang-selector li .dropdown .dropdown-item{padding:0 1em;margin-bottom:8px}header #lang-selector li .dropdown .dropdown-item a span{font-size:14px}header .search{margin-left:auto;margin-right:20px;grid-area:search}header .search input[type=search]{color:var(--gg-dark-gray);background:rgba(255,255,255,.8);border:1px solid #ccc;padding:10px 15px;font-family:inherit;max-width:148px;height:37px;font-size:14px;-webkit-appearance:unset;appearance:unset}header #version-selector{list-style:none;grid-area:ver;line-height:28px;border-radius:0;margin-right:10px;border:none;color:var(--gg-dark-gray);padding:5px 16px 5px 10px;white-space:nowrap;font-size:14px;width:auto;text-align:right;box-sizing:border-box;text-align-last:right;-moz-appearance:none;-webkit-appearance:none;appearance:none;direction:rtl}header #version-selector option{direction:ltr}header>nav{grid-area:nav;font-size:18px;display:flex;flex-direction:row;margin:0 20px}header #lang-selector{grid-area:lang}header .search-close{margin-right:10px}@media (max-width:600px){header .search{margin-right:5px}header .search input[type=search]{max-width:110px}}header:not(.narrow-header) .search-close,header:not(.narrow-header) .top-nav-toggle{display:none}@media (max-width:670px){header>.container{grid-template-columns:auto 1fr auto;grid-template-areas:'left-toggle home search' 'ver api lang'}header #lang-selector li{justify-content:flex-end}}pre,pre.rouge{padding:8px 15px;background:var(--block-code-background)!important;border-radius:5px;border:1px solid #e5e5e5;overflow-x:auto;min-height:36px;line-height:18px;color:#545454}code{color:#545454}pre.rouge code{background:0 0!important}:not(pre)>code{background:var(--inline-code-background);padding:.1em .5em;background-clip:padding-box;border-radius:3px;color:#545454;font-size:90%}.listingblock .content{position:relative}.highlight{color:#586e75}.highlight .c1{color:#657b83}.highlight .nt{color:#b58900}.highlight .o{color:#93a1a1}.highlight .k{color:#6c71c4}.highlight .kt{color:#cb4b16}.highlight .s,.highlight .s1{color:#859900}.highlight .nc{color:#b58900}.highlight .na{color:#268bd2}body{font-family:'Open Sans',sans-serif}h1,h2{color:#000;font-weight:400;font-family:'Open Sans'}h1{font-size:36px;line-height:40px}a{text-decoration:none;color:var(--link-color)}section{color:#545454}.admonitionblock .icon .title{display:none}body{--header-height:64px;--promotion-bar-height:35px;--footer-height:104px;--footer-gap:60px;padding:0;margin:0;display:flex;flex-direction:column;min-height:100vh;background-color:var(--body-background);font-family:'Open Sans',sans-serif}body>section{flex:1}header{position:-webkit-sticky;position:sticky;top:0;z-index:2}*{box-sizing:border-box}@media (max-width:670px){body{--header-height:97px}}.left-nav{padding:10px 20px;width:289px;overflow-y:auto;top:calc(var(--header-height) + var(--promotion-bar-height));height:calc(100vh - var(--header-height) - var(--promotion-bar-height));font-family:'Open Sans';padding-top:var(--padding-top);background-color:var(--body-background)}.left-nav li{list-style:none}.left-nav a,.left-nav button{text-decoration:none;color:#757575;font-size:16px;display:inline-flex;width:100%;margin:2px 0;padding:.25em .375em;background:0 0;border:none;font:inherit;text-align:left}.left-nav a.active{color:var(--link-color)}.left-nav .nav-group{margin-left:6px;font-size:14px}.left-nav nav{border-left:2px solid #ddd;margin-bottom:5px}.left-nav nav.collapsed{display:none}.left-nav nav>li>a,.left-nav nav>li>button{padding-left:20px;text-align:left}.left-nav nav>li>a.active{border-left:var(--orange-line-thickness) solid var(--active-color);padding-left:calc(20px - var(--orange-line-thickness))}.left-nav nav.sub_pages{border:none}.left-nav nav.sub_pages a{padding-left:32px}.left-nav .state-indicator{margin-left:auto;margin-top:5px;width:6.2px;height:10px;flex:0 0 auto;filter:invert(49%) sepia(4%) saturate(5%) hue-rotate(23deg) brightness(92%) contrast(90%)}.left-nav button.expanded .state-indicator{transform:rotate(90deg)}.right-nav{width:289px;padding:12px 26px;overflow-y:auto;height:calc(100vh - var(--header-height));top:0;position:-webkit-sticky;position:sticky;display:flex;flex-direction:column;font-family:'Open sans';padding-top:var(--padding-top);background-color:#fff}.right-nav ul{list-style:none;padding:0;margin:0}.right-nav li{padding:0}.right-nav a{--border-width:0px;font-size:14px;color:#757575;padding-left:calc(15px * var(--nesting-level) + 8px - var(--border-width));margin:.3em 0;display:inline-block}.right-nav .sectlevel1{border-left:2px solid #ddd}.right-nav .sectlevel1{--nesting-level:0}.right-nav .sectlevel2{--nesting-level:1}.right-nav .sectlevel3{--nesting-level:2}@media (max-width:1200px){.right-nav{width:230px}}.right-nav footer{font-size:12px;padding:calc(var(--footer-gap) * .3) 0 5px;text-align:left;margin:auto 0 0}section.page-docs{display:grid;grid-template-columns:auto 1fr auto;grid-template-rows:100%;grid-template-areas:'left-nav content right-nav';line-height:20px;max-width:1440px;margin:auto;width:100%}section.page-docs>article{border-left:1px solid #eee;background-color:#fff;padding:0 50px 30px;grid-area:content;overflow:hidden;font-family:sans-serif;font-size:16px;color:#545454;line-height:1.6em}section.page-docs>article h1,section.page-docs>article h2{font-family:'Open Sans'}@media (max-width:800px){section.page-docs>article{padding-left:15px;padding-right:15px}}section.page-docs .edit-link{position:relative;top:10px;right:10px;float:right;padding-top:calc(var(--header-height) + var(--padding-top));margin-top:calc((-1 * var(--header-height)))}section.page-docs h1,section.page-docs h2{margin-bottom:0}section.page-docs h2[id]{margin-top:var(--margin-top);margin-bottom:calc(var(--margin-top) * .5);z-index:-1}section.page-docs .title{font-style:italic}section.page-docs h2[id]{--margin-top:1.2em}.left-nav{bottom:0;position:-webkit-sticky;position:sticky}.left-nav{grid-area:left-nav}.right-nav{grid-area:right-nav}.left-nav__overlay{display:none;background:rgba(0,0,0,.5);z-index:1;position:fixed;top:var(--header-height);bottom:0;left:0;right:0}@media (max-width:990px){body:not(.hide-left-nav) .left-nav__overlay{display:block}nav.left-nav{background:#fafafa;grid-area:left-nav;box-shadow:0 4px 4px 0 rgba(0,0,0,.24),0 0 4px 0 rgba(0,0,0,.12);min-height:calc(100vh - var(--header-height));max-height:calc(100vh - var(--header-height));position:fixed;bottom:0;top:var(--header-height);z-index:2}section.page-docs>article{grid-column-start:left-nav;grid-column-end:content;grid-row:content}}@media (max-width:800px){nav.right-nav{display:none}}:target:before{content:"";display:block;margin-top:calc(var(--header-height) * -1);height:var(--header-height);width:1px}@media (min-width:600px) and (max-width:900px){:target:before{content:"";display:block;width:1px;margin-top:-150px;height:150px}}
#header #promotion-bar { background-color: #333333; padding: 8px; }
#header #promotion-bar p { font-size: 14px; line-height: 1.4em; font-weight: 600; padding: 0; margin: 0; color: #f0f0f0; text-align: center;}
#header #promotion-bar p a { color: #FCB903; } </style>
<meta name="ignite-version" content="2.10.0" />
<title>Memory and JVM Tuning | Ignite Documentation</title>
<link rel="canonical" href="/docs/2.10.0/perf-and-troubleshooting/memory-tuning" />
<META NAME="ROBOTS" CONTENT="NOINDEX" />
<link rel="shortcut icon" href="/favicon.ico">
<meta name='viewport' content='width=device-width, height=device-height, initial-scale=1.0, minimum-scale=1.0'>
<link rel="preload" as="style" href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;600;700&display=swap" />
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;600;700&display=swap" media="print" onload="this.media='all'">
<noscript>
<link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;600;700&display=swap" rel="stylesheet">
</noscript>
<script>
// AnchorJS - v4.2.0 - 2019-01-01
// https://github.com/bryanbraun/anchorjs
// Copyright (c) 2019 Bryan Braun; Licensed MIT
!function(A,e){"use strict";"function"==typeof define&&define.amd?define([],e):"object"==typeof module&&module.exports?module.exports=e():(A.AnchorJS=e(),A.anchors=new A.AnchorJS)}(this,function(){"use strict";return function(A){function f(A){A.icon=A.hasOwnProperty("icon")?A.icon:"",A.visible=A.hasOwnProperty("visible")?A.visible:"hover",A.placement=A.hasOwnProperty("placement")?A.placement:"right",A.ariaLabel=A.hasOwnProperty("ariaLabel")?A.ariaLabel:"Anchor",A.class=A.hasOwnProperty("class")?A.class:"",A.base=A.hasOwnProperty("base")?A.base:"",A.truncate=A.hasOwnProperty("truncate")?Math.floor(A.truncate):64,A.titleText=A.hasOwnProperty("titleText")?A.titleText:""}function p(A){var e;if("string"==typeof A||A instanceof String)e=[].slice.call(document.querySelectorAll(A));else{if(!(Array.isArray(A)||A instanceof NodeList))throw new Error("The selector provided to AnchorJS was invalid.");e=[].slice.call(A)}return e}this.options=A||{},this.elements=[],f(this.options),this.isTouchDevice=function(){return!!("ontouchstart"in window||window.DocumentTouch&&document instanceof DocumentTouch)},this.add=function(A){var e,t,i,n,o,s,a,r,c,h,l,u,d=[];if(f(this.options),"touch"===(l=this.options.visible)&&(l=this.isTouchDevice()?"always":"hover"),A||(A="h2, h3, h4, h5, h6"),0===(e=p(A)).length)return this;for(function(){if(null===document.head.querySelector("style.anchorjs")){var A,e=document.createElement("style");e.className="anchorjs",e.appendChild(document.createTextNode("")),void 0===(A=document.head.querySelector('[rel="stylesheet"], style'))?document.head.appendChild(e):document.head.insertBefore(e,A),e.sheet.insertRule(" .anchorjs-link { opacity: 0; text-decoration: none; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }",e.sheet.cssRules.length),e.sheet.insertRule(" *:hover > .anchorjs-link, .anchorjs-link:focus { opacity: 1; }",e.sheet.cssRules.length),e.sheet.insertRule(" [data-anchorjs-icon]::after { content: attr(data-anchorjs-icon); }",e.sheet.cssRules.length),e.sheet.insertRule(' @font-face { font-family: "anchorjs-icons"; src: url(data:n/a;base64,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) format("truetype"); }',e.sheet.cssRules.length)}}(),t=document.querySelectorAll("[id]"),i=[].map.call(t,function(A){return A.id}),o=0;o<e.length;o++)if(this.hasAnchorJSLink(e[o]))d.push(o);else{if(e[o].hasAttribute("id"))n=e[o].getAttribute("id");else if(e[o].hasAttribute("data-anchor-id"))n=e[o].getAttribute("data-anchor-id");else{for(c=r=this.urlify(e[o].textContent),a=0;void 0!==s&&(c=r+"-"+a),a+=1,-1!==(s=i.indexOf(c)););s=void 0,i.push(c),e[o].setAttribute("id",c),n=c}n.replace(/-/g," "),(h=document.createElement("a")).className="anchorjs-link "+this.options.class,h.setAttribute("aria-label",this.options.ariaLabel),h.setAttribute("data-anchorjs-icon",this.options.icon),this.options.titleText&&(h.title=this.options.titleText),u=document.querySelector("base")?window.location.pathname+window.location.search:"",u=this.options.base||u,h.href=u+"#"+n,"always"===l&&(h.style.opacity="1"),""===this.options.icon&&(h.style.font="1em/1 anchorjs-icons","left"===this.options.placement&&(h.style.lineHeight="inherit")),"left"===this.options.placement?(h.style.position="absolute",h.style.marginLeft="-1em",h.style.paddingRight="0.5em",e[o].insertBefore(h,e[o].firstChild)):(h.style.paddingLeft="0.375em",e[o].appendChild(h))}for(o=0;o<d.length;o++)e.splice(d[o]-o,1);return this.elements=this.elements.concat(e),this},this.remove=function(A){for(var e,t,i=p(A),n=0;n<i.length;n++)(t=i[n].querySelector(".anchorjs-link"))&&(-1!==(e=this.elements.indexOf(i[n]))&&this.elements.splice(e,1),i[n].removeChild(t));return this},this.removeAll=function(){this.remove(this.elements)},this.urlify=function(A){return this.options.truncate||f(this.options),A.trim().replace(/\'/gi,"").replace(/[& +$,:;=?@"#{}|^~[`%!'<>\]\.\/\(\)\*\\\n\t\b\v]/g,"-").replace(/-{2,}/g,"-").substring(0,this.options.truncate).replace(/^-+|-+$/gm,"").toLowerCase()},this.hasAnchorJSLink=function(A){var e=A.firstChild&&-1<(" "+A.firstChild.className+" ").indexOf(" anchorjs-link "),t=A.lastChild&&-1<(" "+A.lastChild.className+" ").indexOf(" anchorjs-link ");return e||t||!1}}});
</script>
</head>
<body>
<header>
<!--#include virtual="/includes/promotion_banner.html" -->
<div class="container">
<button type='button' class='menu' title='Docs menu'>
<img src="/assets/images/menu-icon.svg" width="18" height="12" alt="menu icon" />
</button>
<div class='home'>
<a href="/" class='home' title='Apache Ignite home'>
<img src="/assets/images/apache_ignite_logo.svg" alt="Apache Ignite logo" width="103" height="36" >
</a>
</div>
<select id="version-selector">
<option value="2.10.0">2.10.0</option>
</select>
<nav id="api-docs"><ul>
<li><a href="#">APIs</a>
<nav class='dropdown'>
<ul>
<li class="dropdown-item"><a href="/releases/latest/javadoc/index.html">Java</a></li>
<li class="dropdown-item"><a href="/releases/latest/dotnetdoc/api/">C#/.NET</a></li>
<li class="dropdown-item"><a href="/releases/latest/cppdoc/index.html">C++</a></li>
<li class="dropdown-item"><a href="/releases/latest/scaladoc/scalar/index.html#org.apache.ignite.scalar.scalar$">Scala</a></li>
</ul>
</nav>
</li>
<li><a href="#">Examples</a>
<nav class="dropdown">
<ul>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/examples" target="_blank" rel="noopener" title="Apache Ignite Java examples">Java</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/dotnet/examples" target="_blank" rel="noopener" title="Apache Ignite C#/.NET examples">C#/.NET</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/cpp/examples" target="_blank" rel="noopener" title="Apache Ignite C++ examples">C++</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/python/examples" target="_blank" rel="noopener" title="Apache Ignite Python examples">Python</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/nodejs/examples" target="_blank" rel="noopener" title="Apache Ignite NodeJS examples">NodeJS</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/php/examples" target="_blank" rel="noopener" title="Apache Ignite PHP examples">PHP</a></li>
</ul>
</nav>
</li></ul>
</nav>
<form class='search'>
<button class="search-close" type='button'><img src='/assets/images/cancel.svg' alt="close" width="10" height="10" /></button>
<input type="search" placeholder="Search…" id="search-input">
</form>
<nav id="lang-selector"><ul>
<li><a href="#"><img src="/assets/images/icon_lang_en_75x75.jpg" alt="English language icon" width="25" height="25" /><span>▼</span></a>
<nav class="dropdown">
<li class="dropdown-item"><a href="/docs/latest/" ><img src="/assets/images/icon_lang_en_75x75.jpg" alt="English language icon" width="25" height="25" /><span>English</span></a></li>
<li class="dropdown-item"><a href="https://www.ignite-service.cn/doc/java/" target="_blank" rel="noopener"><img src="/assets/images/icon_lang_cn_75x75.jpg" width="25" height="25" alt="Chinese language icon" /><span>Chinese</span></a></li>
</nav>
</li></ul>
</nav>
<button type='button' class='top-nav-toggle'>⋮</button>
</div>
</header>
<link rel="stylesheet" href="/assets/css/docs.css">
<section class='page-docs'>
<nav class='left-nav' data-swiftype-index='false'>
<li>
<a href="/docs/2.10.0/index" class='' >Documentation Overview</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Quick Start Guides<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/quick-start/java"
class=''
>Java</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/dotnet"
class=''
>.NET/C#</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/cpp"
class=''
>C++</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/python"
class=''
>Python</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/nodejs"
class=''
>Node.JS</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/sql"
class=''
>SQL</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/php"
class=''
>PHP</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/restapi"
class=''
>REST API</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Installation<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/installation/installing-using-zip"
class=''
>Installing Using ZIP Archive</a>
</li>
<li>
<a href="/docs/2.10.0/installation/installing-using-docker"
class=''
>Installing Using Docker</a>
</li>
<li>
<a href="/docs/2.10.0/installation/deb-rpm"
class=''
>Installing DEB or RPM package</a>
</li>
<li>
<button
type='button'
class='collapsed '>Kubernetes<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/installation/kubernetes/amazon-eks-deployment" class=''>Amazon EKS</a></li>
<li><a href="/docs/2.10.0/installation/kubernetes/azure-deployment" class=''>Azure Kubernetes Service</a></li>
<li><a href="/docs/2.10.0/installation/kubernetes/gke-deployment" class=''>Google Kubernetes Engine</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/installation/vmware-installation"
class=''
>VMWare</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Setting Up<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/understanding-configuration"
class=''
>Understanding Configuration</a>
</li>
<li>
<a href="/docs/2.10.0/setup"
class=''
>Setting Up</a>
</li>
<li>
<a href="/docs/2.10.0/logging"
class=''
>Configuring Logging</a>
</li>
<li>
<a href="/docs/2.10.0/resources-injection"
class=''
>Resources Injection</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/starting-nodes" class='' >Starting and Stopping Nodes</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Clustering<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/clustering/clustering"
class=''
>Overview</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/tcp-ip-discovery"
class=''
>TCP/IP Discovery</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/zookeeper-discovery"
class=''
>ZooKeeper Discovery</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/discovery-in-the-cloud"
class=''
>Discovery in the Cloud</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/network-configuration"
class=''
>Network Configuration</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/connect-client-nodes"
class=''
>Connecting Client Nodes</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/baseline-topology"
class=''
>Baseline Topology</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/running-client-nodes-behind-nat"
class=''
>Running Client Nodes Behind NAT</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Thin Clients<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/thin-clients/getting-started-with-thin-clients"
class=''
>Thin Clients Overview</a>
</li>
<li>
<a href="/docs/2.10.0/thin-clients/java-thin-client"
class=''
>Java Thin Client</a>
</li>
<li>
<a href="/docs/2.10.0/thin-clients/dotnet-thin-client"
class=''
>.NET Thin Client</a>
</li>
<li>
<a href="/docs/2.10.0/thin-clients/cpp-thin-client"
class=''
>C++ Thin Client</a>
</li>
<li>
<a href="/docs/2.10.0/thin-clients/python-thin-client"
class=''
>Python Thin Client</a>
</li>
<li>
<a href="/docs/2.10.0/thin-clients/php-thin-client"
class=''
>PHP Thin Client</a>
</li>
<li>
<a href="/docs/2.10.0/thin-clients/nodejs-thin-client"
class=''
>Node.js Thin Client</a>
</li>
<li>
<button
type='button'
class='collapsed '>Binary Client Protocol<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/binary-client-protocol/binary-client-protocol" class=''>Binary Client Protocol</a></li>
<li><a href="/docs/2.10.0/binary-client-protocol/data-format" class=''>Data Format</a></li>
<li><a href="/docs/2.10.0/binary-client-protocol/key-value-queries" class=''>Key-Value Queries</a></li>
<li><a href="/docs/2.10.0/binary-client-protocol/sql-and-scan-queries" class=''>SQL and Scan Queries</a></li>
<li><a href="/docs/2.10.0/binary-client-protocol/binary-type-metadata" class=''>Binary Types Metadata</a></li>
<li><a href="/docs/2.10.0/binary-client-protocol/cache-configuration" class=''>Cache Configuration</a></li>
</nav>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Data Modeling<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/data-modeling/data-modeling"
class=''
>Introduction</a>
</li>
<li>
<a href="/docs/2.10.0/data-modeling/data-partitioning"
class=''
>Data Partitioning</a>
</li>
<li>
<a href="/docs/2.10.0/data-modeling/affinity-collocation"
class=''
>Affinity Colocation</a>
</li>
<li>
<a href="/docs/2.10.0/data-modeling/binary-marshaller"
class=''
>Binary Marshaller</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Configuring Memory<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/memory-architecture"
class=''
>Memory Architecture</a>
</li>
<li>
<a href="/docs/2.10.0/memory-configuration/data-regions"
class=''
>Configuring Data Regions</a>
</li>
<li>
<a href="/docs/2.10.0/memory-configuration/eviction-policies"
class=''
>Eviction Policies</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Configuring Persistence<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/persistence/native-persistence"
class=''
>Ignite Persistence</a>
</li>
<li>
<a href="/docs/2.10.0/persistence/external-storage"
class=''
>External Storage</a>
</li>
<li>
<a href="/docs/2.10.0/persistence/swap"
class=''
>Swapping</a>
</li>
<li>
<a href="/docs/2.10.0/persistence/custom-cache-store"
class=''
>Implementing Custom Cache Store</a>
</li>
<li>
<a href="/docs/2.10.0/persistence/snapshots"
class=''
>Cluster Snapshots</a>
</li>
<li>
<a href="/docs/2.10.0/persistence/disk-compression"
class=''
>Disk Compression</a>
</li>
<li>
<a href="/docs/2.10.0/persistence/persistence-tuning"
class=''
>Tuning Persistence</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Configuring Caches<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/configuring-caches/configuration-overview"
class=''
>Cache Configuration</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/configuring-backups"
class=''
>Configuring Partition Backups</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/partition-loss-policy"
class=''
>Partition Loss Policy</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/atomicity-modes"
class=''
>Atomicity Modes</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/expiry-policies"
class=''
>Expiry Policy</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/on-heap-caching"
class=''
>On-Heap Caching</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/cache-groups"
class=''
>Cache Groups</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/near-cache"
class=''
>Near Caches</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/data-rebalancing" class='' >Data Rebalancing</a>
</li>
<li>
<a href="/docs/2.10.0/data-streaming" class='' >Data Streaming</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Using Key-Value API<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/key-value-api/basic-cache-operations"
class=''
>Basic Cache Operations</a>
</li>
<li>
<a href="/docs/2.10.0/key-value-api/binary-objects"
class=''
>Working with Binary Objects</a>
</li>
<li>
<a href="/docs/2.10.0/key-value-api/using-scan-queries"
class=''
>Using Scan Queries</a>
</li>
<li>
<a href="/docs/2.10.0/read-repair"
class=''
>Read Repair</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/key-value-api/transactions" class='' >Performing Transactions</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Working with SQL<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/SQL/sql-introduction"
class=''
>Introduction</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/schemas"
class=''
>Understanding Schemas</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/indexes"
class=''
>Defining Indexes</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/sql-api"
class=''
>Using SQL API</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/distributed-joins"
class=''
>Distributed Joins</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/sql-transactions"
class=''
>SQL Transactions</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/custom-sql-func"
class=''
>Custom SQL Functions</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/JDBC/jdbc-driver"
class=''
>JDBC Driver</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/JDBC/jdbc-client-driver"
class=''
>JDBC Client Driver</a>
</li>
<li>
<button
type='button'
class='collapsed '>ODBC Driver<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/SQL/ODBC/odbc-driver" class=''>ODBC Driver</a></li>
<li><a href="/docs/2.10.0//SQL/ODBC/connection-string-dsn" class=''>Connection String and DSN</a></li>
<li><a href="/docs/2.10.0/SQL/ODBC/querying-modifying-data" class=''>Querying and Modifying Data</a></li>
<li><a href="/docs/2.10.0/SQL/ODBC/specification" class=''>Specification</a></li>
<li><a href="/docs/2.10.0/SQL/ODBC/data-types" class=''>Data Types</a></li>
<li><a href="/docs/2.10.0/SQL/ODBC/error-codes" class=''>Error Codes</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/transactions/mvcc"
class=''
>Multiversion Concurrency Control</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>SQL Reference<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/sql-reference/sql-conformance"
class=''
>SQL Conformance</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/ddl"
class=''
>Data Definition Language (DDL)</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/dml"
class=''
>Data Manipulation Language (DML)</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/transactions"
class=''
>Transactions</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/operational-commands"
class=''
>Operational Commands</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/aggregate-functions"
class=''
>Aggregate functions</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/numeric-functions"
class=''
>Numeric Functions</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/string-functions"
class=''
>String Functions</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/date-time-functions"
class=''
>Data and Time Functions</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/system-functions"
class=''
>System Functions</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/data-types"
class=''
>Data Types</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Distributed Computing<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/distributed-computing/distributed-computing"
class=''
>Distributed Computing API</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/cluster-groups"
class=''
>Cluster Groups</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/executor-service"
class=''
>Executor Service</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/map-reduce"
class=''
>MapReduce API</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/load-balancing"
class=''
>Load Balancing</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/fault-tolerance"
class=''
>Fault Tolerance</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/job-scheduling"
class=''
>Job Scheduling</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/collocated-computations"
class=''
>Colocating Computations with Data</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Code Deployment<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/code-deployment/deploying-user-code"
class=''
>Deploying User Code</a>
</li>
<li>
<a href="/docs/2.10.0/code-deployment/peer-class-loading"
class=''
>Peer Class Loading</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Machine Learning<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/machine-learning/machine-learning"
class=''
>Machine Learning</a>
</li>
<li>
<a href="/docs/2.10.0/machine-learning/partition-based-dataset"
class=''
>Partition Based Dataset</a>
</li>
<li>
<a href="/docs/2.10.0/machine-learning/updating-trained-models"
class=''
>Updating Trained Models</a>
</li>
<li>
<button
type='button'
class='collapsed '>Binary Classification<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/machine-learning/binary-classification/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/linear-svm" class=''>Linear SVM (Support Vector Machine)</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/decision-trees" class=''>Decision Trees</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/multilayer-perceptron" class=''>Multilayer Perceptron</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/logistic-regression" class=''>Logistic Regression</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/knn-classification" class=''>k-NN Classification</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/ann" class=''>ANN (Approximate Nearest Neighbor)</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/naive-bayes" class=''>Naive Bayes</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>Regression<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/machine-learning/regression/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/machine-learning/regression/linear-regression" class=''>Linear Regression</a></li>
<li><a href="/docs/2.10.0/machine-learning/regression/decision-trees-regression" class=''>Decision Trees Regression</a></li>
<li><a href="/docs/2.10.0/machine-learning/regression/knn-regression" class=''>k-NN Regression</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>Clustering<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/machine-learning/clustering/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/machine-learning/clustering/k-means-clustering" class=''>K-Means Clustering</a></li>
<li><a href="/docs/2.10.0/machine-learning/clustering/gaussian-mixture" class=''>Gaussian mixture (GMM)</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/machine-learning/preprocessing"
class=''
>Preprocessing</a>
</li>
<li>
<button
type='button'
class='collapsed '>Model Selection<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/machine-learning/model-selection/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/machine-learning/model-selection/evaluator" class=''>Evaluator</a></li>
<li><a href="/docs/2.10.0/machine-learning/model-selection/split-the-dataset-on-test-and-train-datasets" class=''>Split the dataset on test and train datasets</a></li>
<li><a href="/docs/2.10.0/machine-learning/model-selection/hyper-parameter-tuning" class=''>Hyper-parameter tuning</a></li>
<li><a href="/docs/2.10.0/machine-learning/model-selection/pipeline-api" class=''>Pipeline API</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/machine-learning/multiclass-classification"
class=''
>Multiclass Classification</a>
</li>
<li>
<button
type='button'
class='collapsed '>Ensemble Methods<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/machine-learning/ensemble-methods/introduction" class=''></a></li>
<li><a href="/docs/2.10.0/machine-learning/ensemble-methods/stacking" class=''>Stacking</a></li>
<li><a href="/docs/2.10.0/machine-learning/ensemble-methods/baggin" class=''>Bagging</a></li>
<li><a href="/docs/2.10.0/machine-learning/ensemble-methods/random-forest" class=''>Random Forest</a></li>
<li><a href="/docs/2.10.0/machine-learning/ensemble-methods/gradient-boosting" class=''>Gradient Boosting</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/machine-learning/recommendation-systems"
class=''
>Recommendation Systems</a>
</li>
<li>
<button
type='button'
class='collapsed '>Importing Model<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/machine-learning/importing-model/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/machine-learning/importing-model/model-import-from-gxboost" class=''>Import Model from XGBoost</a></li>
<li><a href="/docs/2.10.0/machine-learning/importing-model/model-import-from-apache-spark" class=''>Import Model from Apache Spark</a></li>
</nav>
</li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/key-value-api/continuous-queries" class='' >Using Continuous Queries</a>
</li>
<li>
<a href="/docs/2.10.0/services/services" class='' >Using Ignite Services</a>
</li>
<li>
<a href="/docs/2.10.0/messaging" class='' >Using Ignite Messaging</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Distributed Data Structures<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/data-structures/queue-and-set"
class=''
>Queue and Set</a>
</li>
<li>
<a href="/docs/2.10.0/data-structures/atomic-types"
class=''
>Atomic Types</a>
</li>
<li>
<a href="/docs/2.10.0/data-structures/countdownlatch"
class=''
>CountDownLatch</a>
</li>
<li>
<a href="/docs/2.10.0/data-structures/atomic-sequence"
class=''
>Atomic Sequence</a>
</li>
<li>
<a href="/docs/2.10.0/data-structures/semaphore"
class=''
>Semaphore</a>
</li>
<li>
<a href="/docs/2.10.0/data-structures/id-generator"
class=''
>ID Generator</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/distributed-locks" class='' >Distributed Locks</a>
</li>
<li>
<a href="/docs/2.10.0/restapi" class='' >REST API</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>.NET Specific<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/net-specific/net-configuration-options"
class=''
>Configuration Options</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-deployment-options"
class=''
>Deployment Options</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-standalone-nodes"
class=''
>Standalone Nodes</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-logging"
class=''
>Logging</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-linq"
class=''
>LINQ</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-java-services-execution"
class=''
>Java Services Execution</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-platform-cache"
class=''
>.NET Platform Cache</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-plugins"
class=''
>Plugins</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-serialization"
class=''
>Serialization</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-cross-platform-support"
class=''
>Cross-Platform Support</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-platform-interoperability"
class=''
>Platform Interoperability</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-remote-assembly-loading"
class=''
>Remote Assembly Loading</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-troubleshooting"
class=''
>Troubleshooting</a>
</li>
<li>
<button
type='button'
class='collapsed '>Integrations<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/net-specific/asp-net-output-caching" class=''>ASP.NET Output Caching</a></li>
<li><a href="/docs/2.10.0/net-specific/asp-net-session-state-caching" class=''>ASP.NET Session State Caching</a></li>
<li><a href="/docs/2.10.0/net-specific/net-entity-framework-cache" class=''>Entity Framework 2nd Level Cache</a></li>
</nav>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>C++ Specific<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/cpp-specific/cpp-serialization"
class=''
>Serialization</a>
</li>
<li>
<a href="/docs/2.10.0/cpp-specific/cpp-platform-interoperability"
class=''
>Platform Interoperability</a>
</li>
<li>
<a href="/docs/2.10.0/cpp-specific/cpp-objects-lifetime"
class=''
>Objects Lifetime</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Monitoring<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/monitoring-metrics/intro"
class=''
>Introduction</a>
</li>
<li>
<a href="/docs/2.10.0/monitoring-metrics/cluster-id"
class=''
>Cluster ID and Tag</a>
</li>
<li>
<a href="/docs/2.10.0/monitoring-metrics/cluster-states"
class=''
>Cluster States</a>
</li>
<li>
<button
type='button'
class='collapsed '>Metrics<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/monitoring-metrics/configuring-metrics" class=''>Configuring Metrics</a></li>
<li><a href="/docs/2.10.0/monitoring-metrics/metrics" class=''>JMX Metrics</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>New Metrics System<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/monitoring-metrics/new-metrics-system" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/monitoring-metrics/new-metrics" class=''>Metrics</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/monitoring-metrics/system-views"
class=''
>System Views</a>
</li>
<li>
<a href="/docs/2.10.0/monitoring-metrics/performance-statistics"
class=''
>Performance Statistics</a>
</li>
<li>
<a href="/docs/2.10.0/monitoring-metrics/tracing"
class=''
>Tracing</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Working with Events<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/events/listening-to-events"
class=''
>Enabling and Listenting to Events</a>
</li>
<li>
<a href="/docs/2.10.0/events/events"
class=''
>Events</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Tools<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/tools/control-script"
class=''
>Control Script</a>
</li>
<li>
<a href="/docs/2.10.0/tools/visor-cmd"
class=''
>Visor CMD</a>
</li>
<li>
<a href="/docs/2.10.0/tools/gg-control-center"
class=''
>GridGain Control Center</a>
</li>
<li>
<a href="/docs/2.10.0/tools/sqlline"
class=''
>SQLLine</a>
</li>
<li>
<a href="/docs/2.10.0/tools/tableau"
class=''
>Tableau</a>
</li>
<li>
<a href="/docs/2.10.0/tools/informatica"
class=''
>Informatica</a>
</li>
<li>
<a href="/docs/2.10.0/tools/pentaho"
class=''
>Pentaho</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Security<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/security/authentication"
class=''
>Authentication</a>
</li>
<li>
<a href="/docs/2.10.0/security/ssl-tls"
class=''
>SSL/TLS</a>
</li>
<li>
<button
type='button'
class='collapsed '>Transparent Data Encryption<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/security/tde" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/security/master-key-rotation" class=''>Master key rotation</a></li>
<li><a href="/docs/2.10.0/security/cache-encryption-key-rotation" class=''>Cache encryption key rotation</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/security/sandbox"
class=''
>Sandbox</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Extensions and Integrations<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<button
type='button'
class='collapsed '>Spring<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/extensions-and-integrations/spring/spring-boot" class=''>Spring Boot</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/spring/spring-data" class=''>Spring Data</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/spring/spring-caching" class=''>Spring Caching</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>Ignite for Spark<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/extensions-and-integrations/ignite-for-spark/overview" class=''>Overview</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/ignite-for-spark/ignitecontext-and-rdd" class=''>IgniteContext and IgniteRDD</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/ignite-for-spark/ignite-dataframe" class=''>Ignite DataFrame</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/ignite-for-spark/installation" class=''>Installation</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/ignite-for-spark/spark-shell" class=''>Test Ignite with Spark-shell</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/ignite-for-spark/troubleshooting" class=''>Troubleshooting</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/extensions-and-integrations/hibernate-l2-cache"
class=''
>Hibernate L2 Cache</a>
</li>
<li>
<a href="/docs/2.10.0/extensions-and-integrations/mybatis-l2-cache"
class=''
>MyBatis L2 Cache</a>
</li>
<li>
<button
type='button'
class='collapsed '>Streaming<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/kafka-streamer" class=''>Kafka Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/camel-streamer" class=''>Camel Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/flink-streamer" class=''>Flink Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/flume-sink" class=''>Flume Sink</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/jms-streamer" class=''>JMS Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/mqtt-streamer" class=''>MQTT Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/rocketmq-streamer" class=''>RocketMQ Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/storm-streamer" class=''>Storm Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/zeromq-streamer" class=''>ZeroMQ Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/twitter-streamer" class=''>Twitter Streamer</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>Cassandra Integration<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/extensions-and-integrations/cassandra/overview" class=''>Overview</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/cassandra/configuration" class=''>Configuration</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/cassandra/usage-examples" class=''>Usage Examples</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/cassandra/ddl-generator" class=''>DDL Generator</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/extensions-and-integrations/php-pdo"
class=''
>PHP PDO</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/plugins" class='' >Plugins</a>
</li>
<li>
<button type='button' class='group-toggle expanded '>Performance and Troubleshooting<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group expanded'>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/general-perf-tips"
class=''
>General Performance Tips</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/memory-tuning"
class='active'
>Memory and JVM Tuning</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/persistence-tuning"
class=''
>Persistence Tuning</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/sql-tuning"
class=''
>SQL Tuning</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/thread-pools-tuning"
class=''
>Thread Pools Tuning</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/troubleshooting"
class=''
>Troubleshooting and Debugging</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/handling-exceptions"
class=''
>Handling Exceptions</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/yardstick-benchmarking"
class=''
>Benchmarking With Yardstick</a>
</li>
</nav>
</li>
</nav>
<div class="left-nav__overlay"></div>
<article data-swiftype-index='true'>
<a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/perf-and-troubleshooting/memory-tuning.adoc" target="_blank">Edit</a>
<h1>Memory and JVM Tuning</h1>
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>This article provides best practices for memory tuning that are relevant for deployments with and without native persistence or an external storage.
Even though Ignite stores data and indexes off the Java heap, Java heap is still used to store objects generated by
queries and operations executed by your applications.
Thus, certain recommendations should be considered for JVM and garbage collection (GC) related optimizations.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
<div class="paragraph">
<p>Refer to <a href="/docs/2.10.0/perf-and-troubleshooting/persistence-tuning">persistence</a> tuning article for disk-related
optimization practices.</p>
</div>
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="tune-swappiness-setting">Tune Swappiness Setting</h2>
<div class="sectionbody">
<div class="paragraph">
<p>An operating system starts swapping pages from RAM to disk when overall RAM usage hits a certain threshold.
Swapping can impact Ignite cluster performance.
You can adjust the operating system&#8217;s setting to prevent this from happening.
For Unix, the best option is to either decrease the <code>vm.swappiness</code> parameter to <code>10</code>, or set it to <code>0</code> if native persistence is enabled:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="shell">sysctl <span class="nt">-w</span> vm.swappiness<span class="o">=</span>0</code></pre>
</div>
</div>
<div class="paragraph">
<p>The value of this setting can prolong GC pauses as well. For instance, if your GC logs show <code>low user time, high
system time, long GC pause</code> records, it might be caused by Java heap pages being swapped in and out. To
address this, use the <code>swappiness</code> settings above.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="share-ram-with-os-and-apps">Share RAM with OS and Apps</h2>
<div class="sectionbody">
<div class="paragraph">
<p>An individual machine&#8217;s RAM is shared among the operating system, Ignite, and other applications.
As a general recommendation, if an Ignite cluster is deployed in pure in-memory mode (native
persistence is disabled), then you should not allocate more than 90% of RAM capacity to Ignite nodes.</p>
</div>
<div class="paragraph">
<p>On the other hand, if native persistence is used, then the OS requires extra RAM for its page cache in order to optimally sync up data to disk.
If the page cache is not disabled, then you should not give more than 70% of the server&#8217;s RAM to Ignite.</p>
</div>
<div class="paragraph">
<p>Refer to <a href="/docs/2.10.0/memory-configuration/data-regions">memory configuration</a> for configuration examples.</p>
</div>
<div class="paragraph">
<p>In addition to that, because using native persistence might cause high page cache utilization, the <code>kswapd</code> daemon might not keep up with page reclamation, which is used by the page cache in the background.
As a result, this can cause high latencies due to direct page reclamation and lead to long GC pauses.</p>
</div>
<div class="paragraph">
<p>To work around the effects caused by page memory reclamation on Linux, add extra bytes between <code>wmark_min</code> and <code>wmark_low</code> with <code>/proc/sys/vm/extra_free_kbytes</code>:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="shell">sysctl <span class="nt">-w</span> vm.extra_free_kbytes<span class="o">=</span>1240000</code></pre>
</div>
</div>
<div class="paragraph">
<p>Refer to <a href="https://events.static.linuxfound.org/sites/events/files/lcjp13_moriya.pdf" target="_blank" rel="noopener">this resource</a>
for more insight into the relationship between page cache settings, high latencies, and long GC pauses.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="java-heap-and-gc-tuning">Java Heap and GC Tuning</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Even though Ignite and Ignite keep data in their own off-heap memory regions invisible to Java garbage collectors, Java
Heap is still used for objects generated by your applications workloads.
For instance, whenever you run SQL queries against an Ignite cluster, the queries will access data and indexes stored in
the off-heap memory while the result sets of such queries will be kept in Java Heap until your application reads the result sets.
Thus, depending on the throughput and type of operations, Java Heap can still be utilized heavily and this might require
JVM and GC related tuning for your workloads.</p>
</div>
<div class="paragraph">
<p>We&#8217;ve included some common recommendations and best practices below.
Feel free to start with them and make further adjustments as necessary, depending on the specifics of your applications.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
<div class="paragraph">
<p>Refer to <a href="/docs/2.10.0/perf-and-troubleshooting/troubleshooting#debugging-gc-issues">GC debugging techniques</a> sections for best
practices on GC logs and heap dumps collection.</p>
</div>
</td>
</tr>
</table>
</div>
<div class="sect2">
<h3 id="generic-gc-settings">Generic GC Settings</h3>
<div class="paragraph">
<p>Below are sets of example JVM configurations for applications that can utilize Java Heap on server nodes heavily, thus
triggering long — or frequent, short — stop-the-world GC pauses.</p>
</div>
<div class="paragraph">
<p>For JDK 1.8+ deployments you should use G1 garbage collector.
The settings below are a good starting point if 10GB heap is more than enough for your server nodes:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="shell"><span class="nt">-server</span>
<span class="nt">-Xms10g</span>
<span class="nt">-Xmx10g</span>
<span class="nt">-XX</span>:+AlwaysPreTouch
<span class="nt">-XX</span>:+UseG1GC
<span class="nt">-XX</span>:+ScavengeBeforeFullGC
<span class="nt">-XX</span>:+DisableExplicitGC</code></pre>
</div>
</div>
<div class="paragraph">
<p>If G1 does not work for you, consider using CMS collector and starting with the following settings.
Note that 10GB heap is used as an example and a smaller heap can be enough for your use case:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="shell"><span class="nt">-server</span>
<span class="nt">-Xms10g</span>
<span class="nt">-Xmx10g</span>
<span class="nt">-XX</span>:+AlwaysPreTouch
<span class="nt">-XX</span>:+UseParNewGC
<span class="nt">-XX</span>:+UseConcMarkSweepGC
<span class="nt">-XX</span>:+CMSClassUnloadingEnabled
<span class="nt">-XX</span>:+CMSPermGenSweepingEnabled
<span class="nt">-XX</span>:+ScavengeBeforeFullGC
<span class="nt">-XX</span>:+CMSScavengeBeforeRemark
<span class="nt">-XX</span>:+DisableExplicitGC</code></pre>
</div>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
<div class="paragraph">
<p>If you use <a href="/docs/2.10.0/persistence/native-persistence">Ignite native persistence</a>, we recommend that you set the
<code>MaxDirectMemorySize</code> JVM parameter to <code>walSegmentSize * 4</code>.
With the default WAL settings, this value is equal to 256MB.</p>
</div>
</td>
</tr>
</table>
</div>
</div>
<div class="sect2">
<h3 id="advanced-memory-tuning">Advanced Memory Tuning</h3>
<div class="paragraph">
<p>In Linux and Unix environments, it&#8217;s possible that an application can face long GC pauses or lower performance due to
I/O or memory starvation due to kernel specific settings.
This section provides some guidelines on how to modify kernel settings in order to overcome long GC pauses.</p>
</div>
<div class="admonitionblock warning">
<table>
<tr>
<td class="icon">
<div class="title">Warning</div>
</td>
<td class="content">
<div class="paragraph">
<p>All the shell commands given below were tested on RedHat 7.
They may differ for your Linux distribution.
Before changing the kernel settings, make sure to check the system statistics/logs to confirm that you really have a problem.
Consult your IT department before making changes at the Linux kernel level in production.</p>
</div>
</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>If GC logs show <code>low user time, high system time, long GC pause</code> then most likely memory constraints are triggering swapping or scanning of a free memory space.</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Check and adjust the <a href="/docs/2.10.0/perf-and-troubleshooting/memory-tuning#tune-swappiness-setting">swappiness settings</a>.</p>
</li>
<li>
<p>Add <code>-XX:+AlwaysPreTouch</code> to JVM settings on startup.</p>
</li>
<li>
<p>Disable NUMA zone-reclaim optimization.</p>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="shell">sysctl <span class="nt">-w</span> vm.zone_reclaim_mode<span class="o">=</span>0</code></pre>
</div>
</div>
</li>
<li>
<p>Turn off Transparent Huge Pages if RedHat distribution is used.</p>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="shell"><span class="nb">echo </span>never <span class="o">&gt;</span> /sys/kernel/mm/redhat_transparent_hugepage/enabled
<span class="nb">echo </span>never <span class="o">&gt;</span> /sys/kernel/mm/redhat_transparent_hugepage/defrag</code></pre>
</div>
</div>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="advanced-io-tuning">Advanced I/O Tuning</h3>
<div class="paragraph">
<p>If GC logs show <code>low user time, low system time, long GC pause</code> then GC threads might be spending too much time in the kernel space being blocked by various I/O activities.
For instance, this can be caused by journal commits, gzip, or log roll over procedures.</p>
</div>
<div class="paragraph">
<p>As a solution, you can try changing the page flushing interval from the default 30 seconds to 5 seconds:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="shell">sysctl <span class="nt">-w</span> vm.dirty_writeback_centisecs<span class="o">=</span>500
sysctl <span class="nt">-w</span> vm.dirty_expire_centisecs<span class="o">=</span>500</code></pre>
</div>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
<div class="paragraph">
<p>Refer to the <a href="/docs/2.10.0/perf-and-troubleshooting/persistence-tuning">persistence tuning</a> section for the optimizations related to disk.
Those optimizations can have a positive impact on GC.</p>
</div>
</td>
</tr>
</table>
</div>
</div>
</div>
</div>
<div class="copyright">
© 2021 The Apache Software Foundation.<br/>
Apache, Apache Ignite, the Apache feather and the Apache Ignite logo are either registered trademarks or trademarks of The Apache Software Foundation.
</div>
</article>
<nav class="right-nav" data-swiftype-index='false'>
<div class="toc-wrapper">
<ul class="sectlevel1">
<li><a href="#tune-swappiness-setting">Tune Swappiness Setting</a></li>
<li><a href="#share-ram-with-os-and-apps">Share RAM with OS and Apps</a></li>
<li><a href="#java-heap-and-gc-tuning">Java Heap and GC Tuning</a>
<ul class="sectlevel2">
<li><a href="#generic-gc-settings">Generic GC Settings</a></li>
<li><a href="#advanced-memory-tuning">Advanced Memory Tuning</a></li>
<li><a href="#advanced-io-tuning">Advanced I/O Tuning</a></li>
</ul>
</li>
</ul>
</div>
<nav class="promo-nav">
<!--#include virtual="/includes/docs_rightnav_promotion.html" -->
<a href="#" data-trigger-bugyard-feedback="true" id="doc-feedback-btn">Docs Feedback</a>
</nav>
</nav>
</section>
<script type='module' src='/assets/js/code-copy-to-clipboard.js' async crossorigin></script>
<script>
// inits deep anchors -- needs to be done here because of https://www.bryanbraun.com/anchorjs/#dont-run-it-too-late
anchors.add('.page-docs h1, .page-docs h2, .page-docs h3:not(.discrete), .page-docs h4, .page-docs h5');
anchors.options = {
placement: 'right',
visible: 'always'
};
</script>
<script src="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.js"></script>
<script>
docsearch({
// Your apiKey and indexName will be given to you once
// we create your config
apiKey: '3eee686c0ebe39eff3baeb18c56fa5f8',
indexName: 'apache_ignite',
// Replace inputSelector with a CSS selector
// matching your search input
inputSelector: '#search-input',
// algoliaOptions: { 'facetFilters': ["version:$VERSION"] },
// Set debug to true to inspect the dropdown
debug: false,
});
</script>
<script type='module' src='/assets/js/index.js?1631996417' async crossorigin></script>
<script type='module' src='/assets/js/versioning.js?1631996417' async crossorigin></script>
<link rel="stylesheet" href="/assets/css/styles.css?1631996417" media="print" onload="this.media='all'">
<noscript><link media="all" rel="stylesheet" href="/assets/css/styles.css?1631996417"></noscript>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.css" media="print" onload="this.media='all'">
<noscript><link media="all" rel="stylesheet" href="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.css"></noscript>
</body>
</html>