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HTML
87 lines
4 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>set_cache_max</title>
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<link rel="stylesheet" href="apiReference.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB C++ API Reference" />
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<link rel="up" href="configuration_reference.html" title="Appendix B. DB_CONFIG Parameter Reference" />
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<link rel="prev" href="set_cachesize_parameter.html" title="set_cachesize" />
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<link rel="next" href="set_create_dir_parameter.html" title="set_create_dir" />
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.2</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">set_cache_max</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="set_cachesize_parameter.html">Prev</a> </td>
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<th width="60%" align="center">Appendix B. DB_CONFIG Parameter Reference</th>
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<td width="20%" align="right"> <a accesskey="n" href="set_create_dir_parameter.html">Next</a></td>
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</tr>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="set_cache_max_parameter"></a>set_cache_max</h2>
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</div>
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</div>
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</div>
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<p>
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Sets the maximum size that the <code class="literal">set_cachesize</code>
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parameter is allowed to set. The specified size is rounded to the
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nearest multiple of the cache region size, which is the
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initial cache size divided by the number of regions specified
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to the <code class="literal">set_cachesize</code> parameter. If no value
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is specified, it defaults to the initial cache size.
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</p>
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<p>
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The syntax of this parameter in the <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file is a
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single line with the string
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<code class="literal">set_cache_max</code>, one or more whitespace
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characters, and the maximum cache size in bytes, specified
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in two parts: the gigabytes of cache and the additional
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bytes of cache. For example:
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</p>
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<pre class="programlisting">set_cache_max 2 524288000</pre>
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<p>
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Sets the maximum cache size to 2.5GB.
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</p>
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<p>
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This parameter can be changed with a simple restart of your
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application; you do not need to re-create your environment for it
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to be changed.
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</p>
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<p> For more information, see <a class="xref" href="envset_cache_max.html" title="DbEnv::set_cache_max()">DbEnv::set_cache_max()</a>.</p>
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="set_cachesize_parameter.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="configuration_reference.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="set_create_dir_parameter.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">set_cachesize </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> set_create_dir</td>
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</tr>
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