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<a href="/docs/latest/data-rebalancing" class='' >Data Rebalancing</a>
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<li><a href="/docs/latest/machine-learning/binary-classification/introduction" class=''>Introduction</a></li>
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<li><a href="/docs/latest/machine-learning/binary-classification/logistic-regression" class=''>Logistic Regression</a></li>
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<li><a href="/docs/latest/machine-learning/binary-classification/ann" class=''>ANN (Approximate Nearest Neighbor)</a></li>
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<a href="/docs/latest/machine-learning/preprocessing"
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<a href="/docs/latest/machine-learning/multiclass-classification"
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<li><a href="/docs/latest/machine-learning/ensemble-methods/baggin" class=''>Bagging</a></li>
<li><a href="/docs/latest/machine-learning/ensemble-methods/random-forest" class=''>Random Forest</a></li>
<li><a href="/docs/latest/machine-learning/ensemble-methods/gradient-boosting" class=''>Gradient Boosting</a></li>
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<li>
<a href="/docs/latest/machine-learning/recommendation-systems"
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<li>
<a href="/docs/latest/key-value-api/continuous-queries" class='' >Using Continuous Queries</a>
</li>
<li>
<a href="/docs/latest/services/services" class='' >Using Ignite Services</a>
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<a href="/docs/latest/messaging" class='' >Using Ignite Messaging</a>
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<a href="/docs/latest/data-structures/atomic-types"
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<a href="/docs/latest/data-structures/countdownlatch"
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<a href="/docs/latest/data-structures/atomic-sequence"
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<a href="/docs/latest/data-structures/semaphore"
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<a href="/docs/latest/data-structures/id-generator"
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<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/monitoring-metrics/performance-statistics.adoc" target="_blank">Edit</a>
<h1>Performance Statistics</h1>
<div id="preamble">
<div class="sectionbody">
<div class="admonitionblock warning">
<table>
<tr>
<td class="icon">
<div class="title">Warning</div>
</td>
<td class="content">
This feature is experimental and may change in future releases.
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="overview">Overview</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Ignite provides a built-in tool for cluster profiling.</p>
</div>
<div class="paragraph">
<p>You can <a href="#collecting-statistics">collect</a> performance statistics from the cluster and then
<a href="#building-the-report">build</a> the performance report.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="collecting-statistics">Collecting Statistics</h2>
<div class="sectionbody">
<div class="paragraph">
<p><a href="#jmx">JMX interface</a> and <a href="#control-script">Control Script</a> are used to start and stop statistics collecting.</p>
</div>
<div class="paragraph">
<p>Each node collects performance statistics in a binary file. This file is placed under
the <code>Ignite_work_directory/perf_stat/</code> directory. The name mask is <code>node-{nodeId}-{index}.prf</code>.</p>
</div>
<div class="paragraph">
<p>Performance statistics files are used to build the report offline.</p>
</div>
<div class="paragraph">
<p>Nodes use off-heap cyclic buffer to temporarily store serialized statistics. The writer thread flushes buffer to the
file when the flush size is reached. Some statistics are skipped if the buffer overflows due to a slow disk. See
the <a href="#system-properties">properties</a> section for customization.</p>
</div>
<div class="paragraph">
<p>Each statistics collection process creates a new file on nodes. Each next file has the same name with the
corresponding index. See the examples below:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>node-faedc6c9-3542-4610-ae10-4ff7e0600000.prf</code></p>
</li>
<li>
<p><code>node-faedc6c9-3542-4610-ae10-4ff7e0600000-1.prf</code></p>
</li>
<li>
<p><code>node-faedc6c9-3542-4610-ae10-4ff7e0600000-2.prf</code></p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="building-the-report">Building the Report</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Ignite provides a tool to generate the report from performance statistics files. The tool is published in the
<a href="https://github.com/apache/ignite-extensions/tree/master/modules/performance-statistics-ext/">ignite-extensions</a> repository as <a href="/docs/latest/extensions-and-integrations/performance-statistics">performance-statistics-ext</a>
extension.</p>
</div>
<div class="paragraph">
<p>Follow these steps to build the performance report:</p>
</div>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>Stop collecting statistics and place files from all nodes under an empty directory. For example:</p>
<div class="literalblock">
<div class="content">
<pre>/path_to_files/
├── node-162c7147-fef8-4ea2-bd25-8653c41fc7fa.prf
├── node-7b8a7c5c-f3b7-46c3-90da-e66103c00001.prf
└── node-faedc6c9-3542-4610-ae10-4ff7e0600000.prf</pre>
</div>
</div>
</li>
<li>
<p>Run the script from the release package of the tool:</p>
<div class="literalblock">
<div class="content">
<pre>performance-statistics-tool/build-report.sh path_to_files</pre>
</div>
</div>
</li>
</ol>
</div>
<div class="paragraph">
<p>The performance report is created in the new directory under the performance statistics files
path: <code>path_to_files/report_yyyy-MM-dd_HH-mm-ss/</code>. Open <code>report_yyyy-MM-dd_HH-mm-ss/index.html</code> in the browser to see
the report.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="management">Management</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The following section provides information on JMX, Control Script and system properties.</p>
</div>
<div class="sect2">
<h3 id="jmx">JMX</h3>
<div class="paragraph">
<p>You can manage the performance statistics collection via the <code>PerformanceStatisticsMBean</code> interface:</p>
</div>
<table class="tableblock frame-all grid-all stripes-even stretch">
<colgroup>
<col style="width: 33.3333%;">
<col style="width: 66.6667%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Method</th>
<th class="tableblock halign-left valign-top">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">start()</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Start collecting performance statistics in the cluster.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">stop()</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Stop collecting performance statistics in the cluster.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">rotate()</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Rotate collecting performance statistics in the cluster.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">started()</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">True if performance statistics collection is started.</p></td>
</tr>
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="control-script">Control Script</h3>
<div class="paragraph">
<p>You can manage the performance statistics collection via the <a href="/docs/latest/tools/control-script">Control Script</a>.</p>
</div>
<code-tabs><code-tab data-tab='Unix'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="shell">control.sh <span class="nt">--performance-statistics</span> <span class="o">[</span>start|stop|rotate|status]</code></pre>
</div>
</div></code-tab><code-tab data-tab='Window'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="shell">control.bat <span class="nt">--performance-statistics</span> <span class="o">[</span>start|stop|rotate|status]</code></pre>
</div>
</div></code-tab></code-tabs>
<div class="paragraph">
<p>Parameters:</p>
</div>
<table class="tableblock frame-all grid-all stripes-even stretch">
<colgroup>
<col style="width: 25%;">
<col style="width: 75%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Parameter</th>
<th class="tableblock halign-left valign-top">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>start</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Start collecting performance statistics in the cluster.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>stop</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Stop collecting performance statistics in the cluster.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>rotate</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Rotate collecting performance statistics in the cluster.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>status</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Get status of collecting performance statistics in the cluster.</p></td>
</tr>
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="system-properties">System properties</h3>
<table class="tableblock frame-all grid-all stripes-even stretch">
<colgroup>
<col style="width: 28.5714%;">
<col style="width: 14.2857%;">
<col style="width: 14.2857%;">
<col style="width: 42.8572%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Property</th>
<th class="tableblock halign-left valign-top">Type</th>
<th class="tableblock halign-left valign-top">Default Value</th>
<th class="tableblock halign-left valign-top">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">IGNITE_PERF_STAT_FILE_MAX_SIZE</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Long</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">32 Gb</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Maximum performance statistics file size in bytes. Performance
statistics collection is stopped when the file size is exceeded.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">IGNITE_PERF_STAT_BUFFER_SIZE</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Integer</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">32 Mb</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Performance statistics off heap buffer size in bytes.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">IGNITE_PERF_STAT_FLUSH_SIZE</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Integer</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">8 Mb</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Minimal performance statistics batch size to be flushed in bytes.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">IGNITE_PERF_STAT_CACHED_STRINGS_THRESHOLD</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Integer</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">1024</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Maximum performance statistics cached strings threshold.
String caching is stopped when the threshold is exceeded.</p></td>
</tr>
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</table>
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<li><a href="#building-the-report">Building the Report</a></li>
<li><a href="#management">Management</a>
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