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The size of the in-memory log buffer, in bytes.
</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">BufferSize</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">BufferSize</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">BufferSize</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>
When the logging subsystem is configured for on-disk logging, the
default size of the in-memory log buffer is approximately 32KB. Log
information is stored in-memory until the storage space fills up or
transaction commit forces the information to be flushed to stable
storage. In the presence of long-running transactions or
transactions producing large amounts of data, larger buffer sizes
can increase throughput.
</p>
<p>
When the logging subsystem is configured for in-memory logging, the
default size of the in-memory log buffer is 1MB. Log information is
stored in-memory until the storage space fills up or transaction
abort or commit frees up the memory for new transactions. In the
presence of long-running transactions or transactions producing
large amounts of data, the buffer size must be sufficient to hold
all log information that can accumulate during the longest running
transaction. When choosing log buffer and file sizes for in-memory
logs, applications should ensure the in-memory log buffer size is
large enough that no transaction will ever span the entire buffer,
and avoid a state where the in-memory buffer is full and no space
can be freed because a transaction that started in the first log
"file" is still active.
</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
BufferSize will be ignored.
</p>
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