﻿<html xmlns:MSHelp="http://msdn.microsoft.com/mshelp" xmlns:mshelp="http://msdn.microsoft.com/mshelp" xmlns:ddue="http://ddue.schemas.microsoft.com/authoring/2003/5" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:msxsl="urn:schemas-microsoft-com:xslt"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8" /><META NAME="save" CONTENT="history" /><title>Commit Method </title><meta name="Language" content="en-us" /><meta name="Microsoft.Help.Id" content="M:Lucene.Net.Index.IndexWriter.Commit" /><meta name="Description" content="Commits all pending changes (added &amp; deleted documents, optimizations, segment merges, added indexes, etc." /><meta name="Microsoft.Help.ContentType" content="Reference" /><link rel="stylesheet" type="text/css" href="../styles/Presentation.css" /><link rel="stylesheet" type="text/css" href="ms-help://Hx/HxRuntime/HxLink.css" /><script type="text/javascript" src="../scripts/EventUtilities.js"> </script><script type="text/javascript" src="../scripts/SplitScreen.js"> </script><script type="text/javascript" src="../scripts/Dropdown.js"> </script><script type="text/javascript" src="../scripts/script_manifold.js"> </script><script type="text/javascript" src="../scripts/script_feedBack.js"> </script><script type="text/javascript" src="../scripts/CheckboxMenu.js"> </script><script type="text/javascript" src="../scripts/CommonUtilities.js"> </script><meta name="container" content="Lucene.Net.Index" /><meta name="file" content="9e5b5681-859f-8190-2a3c-2a0b364f95d8" /><meta name="guid" content="9e5b5681-859f-8190-2a3c-2a0b364f95d8" /><xml><MSHelp:Attr Name="AssetID" Value="M:Lucene.Net.Index.IndexWriter.Commit" /><MSHelp:TOCTitle Title="Commit Method " /><MSHelp:RLTitle Title="IndexWriter.Commit Method  (Lucene.Net.Index)" /><MSHelp:Keyword Index="A" Term="M:Lucene.Net.Index.IndexWriter.Commit" /><MSHelp:Attr Name="APIType" Value="Managed" /><MSHelp:Attr Name="APILocation" Value="Lucene.Net.dll" /><MSHelp:Attr Name="APIName" Value="Lucene.Net.Index.IndexWriter.Commit" /><MSHelp:Attr Name="DevLang" Value="CSharp" /><MSHelp:Attr Name="DevLang" Value="VB" /><MSHelp:Attr Name="Locale" Value="en-us" /><MSHelp:Attr Name="TopicType" Value="kbSyntax" /><MSHelp:Attr Name="TopicType" Value="apiref" /><MSHelp:Attr Name="Abstract" Value="Commits all pending changes (added &amp; deleted documents, optimizations, segment merges, added indexes, etc.) to the index, and syncs all referenced index files, such that a reader will see the changes ..." /><MSHelp:Attr Name="AssemblyVersion" Value="2.9.4.1" /></xml><link type="text/css" rel="stylesheet" href="../styles/highlight.css" /><script type="text/javascript" src="../scripts/highlight.js"> </script></head><body><input type="hidden" id="userDataCache" class="userDataStyle" /><input type="hidden" id="hiddenScrollOffset" /><img id="collapseImage" style="display:none; height:0; width:0;" src="../icons/collapse_all.gif" alt="Collapse image" title="Collapse image" /><img id="expandImage" style="display:none; height:0; width:0;" src="../icons/expand_all.gif" alt="Expand Image" title="Expand Image" /><img id="collapseAllImage" style="display:none; height:0; width:0;" src="../icons/collapse_all.gif" /><img id="expandAllImage" style="display:none; height:0; width:0;" src="../icons/expand_all.gif" /><img id="dropDownImage" style="display:none; 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deleted
            documents, optimizations, segment merges, added
            indexes, etc.) to the index, and syncs all referenced
            index files, such that a reader will see the changes
            and the index updates will survive an OS or machine
            crash or power loss.  Note that this does not wait for
            any running background merges to finish.  This may be a
            costly operation, so you should test the cost in your
            application and do it only when really necessary.<p /><p /> Note that this operation calls Directory.sync on
            the index files.  That call should not return until the
            file contents &amp; metadata are on stable storage.  For
            FSDirectory, this calls the OS's fsync.  But, beware:
            some hardware devices may in fact cache writes even
            during fsync, and return before the bits are actually
            on stable storage, to give the appearance of faster
            performance.  If you have such a device, and it does
            not have a battery backup (for example) then on power
            loss it may still lose data.  Lucene cannot guarantee
            consistency on such devices.  <p /><p /><b>NOTE</b>: if this method hits an OutOfMemoryError
            you should immediately close the writer.  See <a href="#OOME">above</a> for details.<p /></div><p /><b>Namespace:</b> <a href="4d52bcdb-050f-b66e-6d74-d7169ebc88b0.htm">Lucene.Net.Index</a><br /><b>Assembly:</b> <span sdata="assembly">Lucene.Net</span> (in Lucene.Net.dll) Version: 2.9.4.1<h1 class="heading"><span onclick="ExpandCollapse(syntaxToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(syntaxToggle, event)" tabindex="0"><img id="syntaxToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />Syntax</span></h1><div id="syntaxSection" class="section" name="collapseableSection" style=""><div id="syntaxCodeBlocks" class="code"><span codeLanguage="CSharp"><table><tr><th>C#</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">void</span> <span class="identifier">Commit</span>()</pre></td></tr></table></span><span codeLanguage="VisualBasicDeclaration"><table><tr><th>Visual Basic</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Sub</span> <span class="identifier">Commit</span></pre></td></tr></table></span><span codeLanguage="ManagedCPlusPlus"><table><tr><th>Visual C++</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">public</span>:
<span class="keyword">void</span> <span class="identifier">Commit</span>()</pre></td></tr></table></span></div></div><h1 class="heading"><span onclick="ExpandCollapse(seeAlsoToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(seeAlsoToggle, event)" tabindex="0"><img id="seeAlsoToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />See Also</span></h1><div id="seeAlsoSection" class="section" name="collapseableSection" style=""><div class="seeAlsoStyle"><a href="cfb56f63-f6d1-efdf-e1eb-54ef6f901cd1.htm">IndexWriter Class</a></div><div class="seeAlsoStyle"><a href="4cec89b1-dd63-b6ce-0958-98fadfafadde.htm">Commit Overload</a></div><div class="seeAlsoStyle"><a href="4d52bcdb-050f-b66e-6d74-d7169ebc88b0.htm">Lucene.Net.Index Namespace</a></div><div class="seeAlsoStyle"><span class="nolink">[!:prepareCommit]</span></div><div class="seeAlsoStyle"><span class="nolink">[!:Commit(Map)]</span></div></div></div><div id="footer"><div class="footerLine"><img width="100%" height="3px" src="../icons/footer.gif" alt="Footer image" title="Footer image" /></div><A NAME="feedback"></A><span id="fb" class="feedbackcss"></span></div></div></body></html>