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<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>Partitions Property </title><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="BerkeleyDB" /><meta name="file" content="P_BerkeleyDB_LockingConfig_Partitions" /><meta name="guid" content="P_BerkeleyDB_LockingConfig_Partitions" /><xml><MSHelp:Attr Name="AssetID" Value="P:BerkeleyDB.LockingConfig.Partitions" /><MSHelp:TOCTitle Title="Partitions Property " /><MSHelp:RLTitle Title="LockingConfig.Partitions Property (BerkeleyDB)" /><MSHelp:Keyword Index="A" Term="P:BerkeleyDB.LockingConfig.Partitions" /><MSHelp:Keyword Index="A" Term="frlrfBerkeleyDBLockingConfigClassPartitionsTopic" /><MSHelp:Keyword Index="K" Term="Partitions property" /><MSHelp:Keyword Index="K" Term="LockingConfig.Partitions property" /><MSHelp:Keyword Index="F" Term="Partitions" /><MSHelp:Keyword Index="F" Term="LockingConfig.Partitions" /><MSHelp:Keyword Index="F" Term="BerkeleyDB.LockingConfig.Partitions" /><MSHelp:Attr Name="APIType" Value="Managed" /><MSHelp:Attr Name="APILocation" Value="libdb_dotnet53.dll" /><MSHelp:Attr Name="APIName" Value="BerkeleyDB.LockingConfig.Partitions" /><MSHelp:Attr Name="APIName" Value="BerkeleyDB.LockingConfig.get_Partitions" /><MSHelp:Attr Name="APIName" Value="BerkeleyDB.LockingConfig.set_Partitions" /><MSHelp:Attr Name="DevLang" Value="CSharp" /><MSHelp:Attr Name="DevLang" Value="VB" /><MSHelp:Attr Name="DevLang" Value="C++" /><MSHelp:Attr Name="Locale" Value="en-us" /><MSHelp:Attr Name="TopicType" Value="kbSyntax" /><MSHelp:Attr Name="TopicType" Value="apiref" /><MSHelp:Attr Name="Abstract" Value="The number of lock table partitions in the Berkeley DB environment." /><MSHelp:Attr Name="AssemblyVersion" Value="5.3.28.0" /></xml></head><body><input type="hidden" id="userDataCache" class="userDataStyle" /><input type="hidden" id="hiddenScrollOffset" /><img id="collapseImage" style="display:none; 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The number of lock table partitions in the Berkeley DB environment.
</div><p />
<b>Namespace:</b>
<a href="N_BerkeleyDB.htm">BerkeleyDB</a><br />
<b>Assembly:</b>
<span sdata="assembly">libdb_dotnet53</span> (in libdb_dotnet53.dll) Version: 5.3.28.0<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> <a href="http://msdn2.microsoft.com/en-us/library/ctys3981" target="_blank">uint</a> <span class="identifier">Partitions</span> { <span class="keyword">get</span>; <span class="keyword">set</span>; }</pre></td></tr></table></span><span codeLanguage="VisualBasicDeclaration"><table><tr><th>Visual Basic (Declaration)</th></tr><tr><td><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Property</span> <span class="identifier">Partitions</span> <span class="keyword">As</span> <a href="http://msdn2.microsoft.com/en-us/library/ctys3981" target="_blank">UInteger</a></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">property</span> <a href="http://msdn2.microsoft.com/en-us/library/ctys3981" target="_blank">unsigned int</a> <span class="identifier">Partitions</span> {
<a href="http://msdn2.microsoft.com/en-us/library/ctys3981" target="_blank">unsigned int</a> <span class="keyword">get</span> ();
<span class="keyword">void</span> <span class="keyword">set</span> (<a href="http://msdn2.microsoft.com/en-us/library/ctys3981" target="_blank">unsigned int</a> <span class="parameter">value</span>);
}</pre></td></tr></table></span></div></div><h1 class="heading"><span onclick="ExpandCollapse(remarksToggle)" style="cursor:default;" onkeypress="ExpandCollapse_CheckKey(remarksToggle, event)" tabindex="0"><img id="remarksToggle" class="toggle" name="toggleSwitch" src="../icons/collapse_all.gif" />Remarks</span></h1><div id="remarksSection" class="section" name="collapseableSection" style="">
<p>
The default value is 10 times the number of CPUs on the system if
there is more than one CPU. Increasing the number of partitions can
provide for greater throughput on a system with multiple CPUs and
more than one thread contending for the lock manager. On single
processor systems more than one partition may increase the overhead
of the lock manager. Systems often report threading contexts as
CPUs. If your system does this, set the number of partitions to 1 to
get optimal performance.
</p>
<p>
If the database environment already exists when
<a href="M_BerkeleyDB_DatabaseEnvironment_Open.htm">Open(String, DatabaseEnvironmentConfig)</a> is called, the value of
Partitions will be ignored.
</p>
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