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<p>Library Version 18.1.40</p>
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<h2 class="title" style="clear: both"><a id="db_tuner"></a>db_tuner</h2>
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<pre class="programlisting">db_tuner [-c cachesize] -d file [-h home] [-s database] [-S o | v] [-v] </pre>
<p>
The <span class="command"><strong>db_tuner</strong></span> utility analyzes the data in a btree database,
and suggests a page size that is likely to deliver optimal operation.
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>
<p>
The <span class="command"><strong>db_tuner</strong></span> utility assumes that databases are compacted
when analysing the data. The analysis is based on a static view of the data and
the data access and update patterns are not take into account.
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<p>
The options are as follows:
</p>
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<ul type="disc">
<li>
<p>
<span class="bold"><strong>-c</strong></span>
</p>
<p>
Specify a value of the cachesize, otherwise, the default value will
be set.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-d</strong></span>
</p>
<p>
Display database statistics for the specified file. If the database contains
multiple databases and the -s flag is not specified, the statistics are for
the internal database that describes the other databases the file contains,
and not for the file as a whole.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-h</strong></span>
</p>
<p>
Specify a home directory for the database environment.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-s</strong></span>
</p>
<p>
Display page size recommendation for the specified database contained in the
file specified with the -d flag.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-S</strong></span>
</p>
<p>
Verify the specified database before analyzing the database. The analysis
is not performed if the database is corrupted. Use this option when you are
not sure about the integrity of the database.
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<li>
<p>
<span class="bold"><strong>o</strong></span>
</p>
<p>
Skip the database checks for btree and duplicate sort order and for
hashing. See also <span class="bold"><strong>-o</strong></span> option for
db_verify.
</p>
</li>
<li>
<p>
<span class="bold"><strong>v</strong></span>
</p>
<p>
Perform the standard verification on the database as performed by
db_verify without options.
</p>
</li>
</ul>
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</li>
<li>
<p>
<span class="bold"><strong>-v</strong></span>
</p>
<p>
Display verbose information.
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</li>
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