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<article class="content wrap" id="_content" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler">
<h1 id="Lucene_Net_Index_ConcurrentMergeScheduler" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler" class="text-break">Class ConcurrentMergeScheduler
</h1>
<div class="markdown level0 summary"><p>A <a class="xref" href="Lucene.Net.Index.MergeScheduler.html">MergeScheduler</a> that runs each merge using a
separate thread.</p>
<p>Specify the max number of threads that may run at
once, and the maximum number of simultaneous merges
with <a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.html#Lucene_Net_Index_ConcurrentMergeScheduler_SetMaxMergesAndThreads_System_Int32_System_Int32_">SetMaxMergesAndThreads(Int32, Int32)</a>.</p>
<p>If the number of merges exceeds the max number of threads
then the largest merges are paused until one of the smaller
merges completes.</p>
<p>If more than <a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.html#Lucene_Net_Index_ConcurrentMergeScheduler_MaxMergeCount">MaxMergeCount</a> merges are
requested then this class will forcefully throttle the
incoming threads by pausing until one more more merges
complete.</p>
</div>
<div class="markdown level0 conceptual"></div>
<div class="inheritance">
<h5>Inheritance</h5>
<div class="level0"><span class="xref">System.Object</span></div>
<div class="level1"><a class="xref" href="Lucene.Net.Index.MergeScheduler.html">MergeScheduler</a></div>
<div class="level2"><span class="xref">ConcurrentMergeScheduler</span></div>
</div>
<div classs="implements">
<h5>Implements</h5>
<div><a class="xref" href="Lucene.Net.Index.IConcurrentMergeScheduler.html">IConcurrentMergeScheduler</a></div>
<div><a class="xref" href="Lucene.Net.Index.IMergeScheduler.html">IMergeScheduler</a></div>
<div><span class="xref">System.IDisposable</span></div>
</div>
<div class="inheritedMembers">
<h5>Inherited Members</h5>
<div>
<a class="xref" href="Lucene.Net.Index.MergeScheduler.html#Lucene_Net_Index_MergeScheduler_Dispose">MergeScheduler.Dispose()</a>
</div>
<div>
<span class="xref">System.Object.Equals(System.Object)</span>
</div>
<div>
<span class="xref">System.Object.Equals(System.Object, System.Object)</span>
</div>
<div>
<span class="xref">System.Object.GetHashCode()</span>
</div>
<div>
<span class="xref">System.Object.GetType()</span>
</div>
<div>
<span class="xref">System.Object.MemberwiseClone()</span>
</div>
<div>
<span class="xref">System.Object.ReferenceEquals(System.Object, System.Object)</span>
</div>
</div>
<h6><strong>Namespace</strong>: <a class="xref" href="Lucene.Net.Index.html">Lucene.Net.Index</a></h6>
<h6><strong>Assembly</strong>: Lucene.Net.dll</h6>
<h5 id="Lucene_Net_Index_ConcurrentMergeScheduler_syntax">Syntax</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public class ConcurrentMergeScheduler : MergeScheduler, IConcurrentMergeScheduler, IMergeScheduler, IDisposable</code></pre>
</div>
<h3 id="constructors">Constructors
</h3>
<span class="small pull-right mobile-hide">
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</span>
<a id="Lucene_Net_Index_ConcurrentMergeScheduler__ctor_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.#ctor*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler__ctor" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.#ctor">ConcurrentMergeScheduler()</h4>
<div class="markdown level1 summary"><p>Sole constructor, with all settings set to default
values.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public ConcurrentMergeScheduler()</code></pre>
</div>
<h3 id="fields">Fields
</h3>
<span class="small pull-right mobile-hide">
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<a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_ConcurrentMergeScheduler_compareByMergeDocCount.md&amp;value=---%0Auid%3A%20Lucene.Net.Index.ConcurrentMergeScheduler.compareByMergeDocCount%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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</span>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_compareByMergeDocCount" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.compareByMergeDocCount">compareByMergeDocCount</h4>
<div class="markdown level1 summary"><p>Sorts <a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.MergeThread.html">ConcurrentMergeScheduler.MergeThread</a>s; larger merges come first. </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected static readonly IComparer&lt;ConcurrentMergeScheduler.MergeThread&gt; compareByMergeDocCount</code></pre>
</div>
<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Collections.Generic.IComparer</span>&lt;<a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.MergeThread.html">ConcurrentMergeScheduler.MergeThread</a>&gt;</td>
<td></td>
</tr>
</tbody>
</table>
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</span>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_DEFAULT_MAX_MERGE_COUNT" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.DEFAULT_MAX_MERGE_COUNT">DEFAULT_MAX_MERGE_COUNT</h4>
<div class="markdown level1 summary"><p>Default <a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.html#Lucene_Net_Index_ConcurrentMergeScheduler_MaxMergeCount">MaxMergeCount</a>. </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public const int DEFAULT_MAX_MERGE_COUNT = 2</code></pre>
</div>
<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td></td>
</tr>
</tbody>
</table>
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</span>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_DEFAULT_MAX_THREAD_COUNT" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.DEFAULT_MAX_THREAD_COUNT">DEFAULT_MAX_THREAD_COUNT</h4>
<div class="markdown level1 summary"><p>Default <a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.html#Lucene_Net_Index_ConcurrentMergeScheduler_MaxThreadCount">MaxThreadCount</a>.
We default to 1: tests on spinning-magnet drives showed slower
indexing performance if more than one merge thread runs at
once (though on an SSD it was faster)</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public const int DEFAULT_MAX_THREAD_COUNT = 1</code></pre>
</div>
<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td></td>
</tr>
</tbody>
</table>
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<a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_ConcurrentMergeScheduler_m_dir.md&amp;value=---%0Auid%3A%20Lucene.Net.Index.ConcurrentMergeScheduler.m_dir%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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</span>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_m_dir" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.m_dir">m_dir</h4>
<div class="markdown level1 summary"><p><a class="xref" href="Lucene.Net.Store.Directory.html">Directory</a> that holds the index. </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected Directory m_dir</code></pre>
</div>
<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="xref" href="Lucene.Net.Store.Directory.html">Directory</a></td>
<td></td>
</tr>
</tbody>
</table>
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</span>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_m_mergeThreadCount" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.m_mergeThreadCount">m_mergeThreadCount</h4>
<div class="markdown level1 summary"><p>How many <a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.MergeThread.html">ConcurrentMergeScheduler.MergeThread</a>s have kicked off (this is use
to name them).</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected int m_mergeThreadCount</code></pre>
</div>
<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td></td>
</tr>
</tbody>
</table>
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</span>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_m_mergeThreads" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.m_mergeThreads">m_mergeThreads</h4>
<div class="markdown level1 summary"><p>List of currently active <a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.MergeThread.html">ConcurrentMergeScheduler.MergeThread</a>s. </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected IList&lt;ConcurrentMergeScheduler.MergeThread&gt; m_mergeThreads</code></pre>
</div>
<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Collections.Generic.IList</span>&lt;<a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.MergeThread.html">ConcurrentMergeScheduler.MergeThread</a>&gt;</td>
<td></td>
</tr>
</tbody>
</table>
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</span>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_m_writer" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.m_writer">m_writer</h4>
<div class="markdown level1 summary"><p><a class="xref" href="Lucene.Net.Index.IndexWriter.html">IndexWriter</a> that owns this instance. </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected IndexWriter m_writer</code></pre>
</div>
<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="xref" href="Lucene.Net.Index.IndexWriter.html">IndexWriter</a></td>
<td></td>
</tr>
</tbody>
</table>
<h3 id="properties">Properties
</h3>
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<a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_ConcurrentMergeScheduler_IsVerbose.md&amp;value=---%0Auid%3A%20Lucene.Net.Index.ConcurrentMergeScheduler.IsVerbose%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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<a id="Lucene_Net_Index_ConcurrentMergeScheduler_IsVerbose_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.IsVerbose*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_IsVerbose" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.IsVerbose">IsVerbose</h4>
<div class="markdown level1 summary"><p>Returns <code>true</code> if verbosing is enabled. This method is usually used in
conjunction with <a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.html#Lucene_Net_Index_ConcurrentMergeScheduler_Message_System_String_">Message(String)</a>, like that:</p>
<pre><code>if (IsVerbose)
{
Message(&quot;your message&quot;);
}</code></pre>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected virtual bool IsVerbose { get; }</code></pre>
</div>
<h5 class="propertyValue">Property Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Boolean</span></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Index_ConcurrentMergeScheduler_MaxMergeCount_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.MaxMergeCount*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_MaxMergeCount" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.MaxMergeCount">MaxMergeCount</h4>
<div class="markdown level1 summary"><p>See <a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.html#Lucene_Net_Index_ConcurrentMergeScheduler_SetMaxMergesAndThreads_System_Int32_System_Int32_">SetMaxMergesAndThreads(Int32, Int32)</a>. </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public virtual int MaxMergeCount { get; }</code></pre>
</div>
<h5 class="propertyValue">Property Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Index_ConcurrentMergeScheduler_MaxThreadCount_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.MaxThreadCount*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_MaxThreadCount" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.MaxThreadCount">MaxThreadCount</h4>
<div class="markdown level1 summary"><p>Returns <span class="xref">Lucene.Net.Index.ConcurrentMergeScheduler.maxThreadCount</span>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public virtual int MaxThreadCount { get; }</code></pre>
</div>
<h5 class="propertyValue">Property Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="Lucene_Net_Index_ConcurrentMergeScheduler_MaxThreadCount_seealso">See Also</h5>
<div class="seealso">
<div><a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.html#Lucene_Net_Index_ConcurrentMergeScheduler_SetMaxMergesAndThreads_System_Int32_System_Int32_">SetMaxMergesAndThreads(Int32, Int32)</a></div>
</div>
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<a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_ConcurrentMergeScheduler_MergeThreadCount.md&amp;value=---%0Auid%3A%20Lucene.Net.Index.ConcurrentMergeScheduler.MergeThreadCount%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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</span>
<a id="Lucene_Net_Index_ConcurrentMergeScheduler_MergeThreadCount_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.MergeThreadCount*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_MergeThreadCount" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.MergeThreadCount">MergeThreadCount</h4>
<div class="markdown level1 summary"><p>Returns the number of merge threads that are alive. Note that this number
is &lt;= <a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.html#Lucene_Net_Index_ConcurrentMergeScheduler_m_mergeThreads">m_mergeThreads</a> size.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected virtual int MergeThreadCount { get; }</code></pre>
</div>
<h5 class="propertyValue">Property Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td></td>
</tr>
</tbody>
</table>
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</span>
<a id="Lucene_Net_Index_ConcurrentMergeScheduler_MergeThreadPriority_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.MergeThreadPriority*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_MergeThreadPriority" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.MergeThreadPriority">MergeThreadPriority</h4>
<div class="markdown level1 summary"><p>Return the priority that merge threads run at. By
default the priority is 1 plus the priority of (ie,
slightly higher priority than) the first thread that
calls merge.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public virtual int MergeThreadPriority { get; }</code></pre>
</div>
<h5 class="propertyValue">Property Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td></td>
</tr>
</tbody>
</table>
<h3 id="methods">Methods
</h3>
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<a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_ConcurrentMergeScheduler_ClearSuppressExceptions.md&amp;value=---%0Auid%3A%20Lucene.Net.Index.ConcurrentMergeScheduler.ClearSuppressExceptions%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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</span>
<a id="Lucene_Net_Index_ConcurrentMergeScheduler_ClearSuppressExceptions_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.ClearSuppressExceptions*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_ClearSuppressExceptions" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.ClearSuppressExceptions">ClearSuppressExceptions()</h4>
<div class="markdown level1 summary"><p>Used for testing </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public virtual void ClearSuppressExceptions()</code></pre>
</div>
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<a id="Lucene_Net_Index_ConcurrentMergeScheduler_Clone_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.Clone*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_Clone" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.Clone">Clone()</h4>
<div class="markdown level1 summary"></div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public override object Clone()</code></pre>
</div>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Object</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="Lucene.Net.Index.MergeScheduler.html#Lucene_Net_Index_MergeScheduler_Clone">MergeScheduler.Clone()</a></div>
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<a id="Lucene_Net_Index_ConcurrentMergeScheduler_Dispose_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.Dispose*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_Dispose_System_Boolean_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.Dispose(System.Boolean)">Dispose(Boolean)</h4>
<div class="markdown level1 summary"></div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected override void Dispose(bool disposing)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Boolean</span></td>
<td><span class="parametername">disposing</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="Lucene.Net.Index.MergeScheduler.html#Lucene_Net_Index_MergeScheduler_Dispose_System_Boolean_">MergeScheduler.Dispose(Boolean)</a></div>
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<a id="Lucene_Net_Index_ConcurrentMergeScheduler_DoMerge_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.DoMerge*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_DoMerge_Lucene_Net_Index_MergePolicy_OneMerge_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.DoMerge(Lucene.Net.Index.MergePolicy.OneMerge)">DoMerge(MergePolicy.OneMerge)</h4>
<div class="markdown level1 summary"><p>Does the actual merge, by calling <a class="xref" href="Lucene.Net.Index.IndexWriter.html#Lucene_Net_Index_IndexWriter_Merge_Lucene_Net_Index_MergePolicy_OneMerge_">Merge(MergePolicy.OneMerge)</a> </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected virtual void DoMerge(MergePolicy.OneMerge merge)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="xref" href="Lucene.Net.Index.MergePolicy.OneMerge.html">MergePolicy.OneMerge</a></td>
<td><span class="parametername">merge</span></td>
<td></td>
</tr>
</tbody>
</table>
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</span>
<a id="Lucene_Net_Index_ConcurrentMergeScheduler_GetMergeThread_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.GetMergeThread*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_GetMergeThread_Lucene_Net_Index_IndexWriter_Lucene_Net_Index_MergePolicy_OneMerge_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.GetMergeThread(Lucene.Net.Index.IndexWriter,Lucene.Net.Index.MergePolicy.OneMerge)">GetMergeThread(IndexWriter, MergePolicy.OneMerge)</h4>
<div class="markdown level1 summary"><p>Create and return a new <a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.MergeThread.html">ConcurrentMergeScheduler.MergeThread</a> </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected virtual ConcurrentMergeScheduler.MergeThread GetMergeThread(IndexWriter writer, MergePolicy.OneMerge merge)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="xref" href="Lucene.Net.Index.IndexWriter.html">IndexWriter</a></td>
<td><span class="parametername">writer</span></td>
<td></td>
</tr>
<tr>
<td><a class="xref" href="Lucene.Net.Index.MergePolicy.OneMerge.html">MergePolicy.OneMerge</a></td>
<td><span class="parametername">merge</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.MergeThread.html">ConcurrentMergeScheduler.MergeThread</a></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Index_ConcurrentMergeScheduler_HandleMergeException_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.HandleMergeException*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_HandleMergeException_System_Exception_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.HandleMergeException(System.Exception)">HandleMergeException(Exception)</h4>
<div class="markdown level1 summary"><p>Called when an exception is hit in a background merge
thread</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected virtual void HandleMergeException(Exception exc)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Exception</span></td>
<td><span class="parametername">exc</span></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Index_ConcurrentMergeScheduler_Merge_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.Merge*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_Merge_Lucene_Net_Index_IndexWriter_Lucene_Net_Index_MergeTrigger_System_Boolean_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.Merge(Lucene.Net.Index.IndexWriter,Lucene.Net.Index.MergeTrigger,System.Boolean)">Merge(IndexWriter, MergeTrigger, Boolean)</h4>
<div class="markdown level1 summary"></div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public override void Merge(IndexWriter writer, MergeTrigger trigger, bool newMergesFound)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a class="xref" href="Lucene.Net.Index.IndexWriter.html">IndexWriter</a></td>
<td><span class="parametername">writer</span></td>
<td></td>
</tr>
<tr>
<td><a class="xref" href="Lucene.Net.Index.MergeTrigger.html">MergeTrigger</a></td>
<td><span class="parametername">trigger</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Boolean</span></td>
<td><span class="parametername">newMergesFound</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="Lucene.Net.Index.MergeScheduler.html#Lucene_Net_Index_MergeScheduler_Merge_Lucene_Net_Index_IndexWriter_Lucene_Net_Index_MergeTrigger_System_Boolean_">MergeScheduler.Merge(IndexWriter, MergeTrigger, Boolean)</a></div>
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<a id="Lucene_Net_Index_ConcurrentMergeScheduler_Message_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.Message*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_Message_System_String_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.Message(System.String)">Message(String)</h4>
<div class="markdown level1 summary"><p>Outputs the given message - this method assumes <a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.html#Lucene_Net_Index_ConcurrentMergeScheduler_IsVerbose">IsVerbose</a> was
called and returned <code>true</code>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected virtual void Message(string message)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td><span class="parametername">message</span></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Index_ConcurrentMergeScheduler_SetMaxMergesAndThreads_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.SetMaxMergesAndThreads*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_SetMaxMergesAndThreads_System_Int32_System_Int32_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.SetMaxMergesAndThreads(System.Int32,System.Int32)">SetMaxMergesAndThreads(Int32, Int32)</h4>
<div class="markdown level1 summary"><p>Sets the maximum number of merge threads and simultaneous merges allowed.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public virtual void SetMaxMergesAndThreads(int maxMergeCount, int maxThreadCount)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td><span class="parametername">maxMergeCount</span></td>
<td><p>the max # simultaneous merges that are allowed.
If a merge is necessary yet we already have this many
threads running, the incoming thread (that is calling
add/updateDocument) will block until a merge thread
has completed. Note that we will only run the
smallest <code data-dev-comment-type="paramref" class="paramref">maxThreadCount</code> merges at a time. </p>
</td>
</tr>
<tr>
<td><span class="xref">System.Int32</span></td>
<td><span class="parametername">maxThreadCount</span></td>
<td><p>The max # simultaneous merge threads that should
be running at once. This must be &lt;= <code data-dev-comment-type="paramref" class="paramref">maxMergeCount</code> </p>
</td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Index_ConcurrentMergeScheduler_SetMergeThreadPriority_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.SetMergeThreadPriority*"></a>
<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_SetMergeThreadPriority_System_Int32_" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.SetMergeThreadPriority(System.Int32)">SetMergeThreadPriority(Int32)</h4>
<div class="markdown level1 summary"><p>Set the base priority that merge threads run at.
Note that CMS may increase priority of some merge
threads beyond this base priority. It&apos;s best not to
set this any higher than
<span class="xref">System.Threading.ThreadPriority.Highest</span>(4)-maxThreadCount, so that CMS has
room to set relative priority among threads.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public virtual void SetMergeThreadPriority(int priority)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td><span class="parametername">priority</span></td>
<td></td>
</tr>
</tbody>
</table>
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<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_SetSuppressExceptions" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.SetSuppressExceptions">SetSuppressExceptions()</h4>
<div class="markdown level1 summary"><p>Used for testing </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public virtual void SetSuppressExceptions()</code></pre>
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<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_Sync" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.Sync">Sync()</h4>
<div class="markdown level1 summary"><p>Wait for any running merge threads to finish. This call is not interruptible as used by <a class="xref" href="Lucene.Net.Index.ConcurrentMergeScheduler.html#Lucene_Net_Index_ConcurrentMergeScheduler_Dispose_System_Boolean_">Dispose(Boolean)</a>. </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public virtual void Sync()</code></pre>
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<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_ToString" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.ToString">ToString()</h4>
<div class="markdown level1 summary"></div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public override string ToString()</code></pre>
</div>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><span class="xref">System.Object.ToString()</span></div>
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<h4 id="Lucene_Net_Index_ConcurrentMergeScheduler_UpdateMergeThreads" data-uid="Lucene.Net.Index.ConcurrentMergeScheduler.UpdateMergeThreads">UpdateMergeThreads()</h4>
<div class="markdown level1 summary"><p>Called whenever the running merges have changed, to pause &amp; unpause
threads. This method sorts the merge threads by their merge size in
descending order and then pauses/unpauses threads from first to last --
that way, smaller merges are guaranteed to run before larger ones.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected virtual void UpdateMergeThreads()</code></pre>
</div>
<h3 id="implements">Implements</h3>
<div>
<a class="xref" href="Lucene.Net.Index.IConcurrentMergeScheduler.html">IConcurrentMergeScheduler</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Index.IMergeScheduler.html">IMergeScheduler</a>
</div>
<div>
<span class="xref">System.IDisposable</span>
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