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https://github.com/yasuhirokimura/db18
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Yasuhiro KIMURA
88 lines
3.9 KiB
HTML
88 lines
3.9 KiB
HTML
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<title>set_slice_count</title>
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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 D. DB_CONFIG Parameter Reference" />
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<p>Library Version 18.1.40</p>
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<tr>
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<th colspan="3" align="center">set_slice_count</th>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="set_lk_partitions_parameter.html">Prev</a> </td>
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<th width="60%" align="center">Appendix D. DB_CONFIG Parameter Reference</th>
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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_slice_count_parameter"></a>set_slice_count</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 number of slices to use for a sliced database
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environment. The value provided here must be a positive
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integer. However, for any performance benefits to be
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realized through the use of slices, this value should be
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greater than 1. For best results, set this value equal to
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the number of available cores.
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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_slice_count</code>, one or more
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whitespace characters, and the number of slices that you
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want to use.
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</p>
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<p>
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If slice support is not configured for the database at
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compile time, then this parameter is ignored. In addition
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to this parameter, DB handles must be open with
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the <code class="literal">DB_SLICED</code>
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flag in order for the database to be sliced.
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</p>
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<p>
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If the database environment already exists when this parameter is
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changed, it is ignored. To change this value after the environment
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has been created, re-create your environment.
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</p>
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<td width="40%" align="left"><a accesskey="p" href="set_lk_partitions_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="slice_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_lk_partitions </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"> slice</td>
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