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<div class="sect1" lang="en" xml:lang="en">
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<div>
<h2 class="title" style="clear: both"><a id="db_stat"></a>db_stat</h2>
</div>
</div>
</div>
<pre class="programlisting">db_stat -d file [-fN] [-h home] [-P password] [-s database]
db_stat [-cEelmNrtVxZ] [-C Aclop] [-h home] [-L A] [-M Ah] [-R A]
[-P password] </pre>
<p>
The <span class="command"><strong>db_stat</strong></span> utility displays statistics for Berkeley DB environments.
</p>
<p>
The options are as follows:
</p>
<div class="itemizedlist">
<ul type="disc">
<li>
<p>
<span class="bold"><strong>-C</strong></span>
</p>
<p>
Display detailed information about the locking subsystem.
</p>
<div class="itemizedlist">
<ul type="circle">
<li>
<p>
<span class="bold"><strong>A</strong></span>
</p>
<p>
Display all information.
</p>
</li>
<li>
<p>
<span class="bold"><strong>c</strong></span>
</p>
<p>
Display lock conflict matrix.
</p>
</li>
<li>
<p>
<span class="bold"><strong>l</strong></span>
</p>
<p>
Display lockers within hash chains.
</p>
</li>
<li>
<p>
<span class="bold"><strong>o</strong></span>
</p>
<p>
Display lock objects within hash chains.
</p>
</li>
<li>
<p>
<span class="bold"><strong>p</strong></span>
</p>
<p>
Display locking subsystem parameters.
</p>
</li>
</ul>
</div>
</li>
<li>
<p>
<span class="bold"><strong>-c</strong></span>
</p>
<p>
Display locking subsystem statistics, as described in the
<a class="xref" href="lockstat.html" title="DbEnv::lock_stat()">DbEnv::lock_stat()</a> method.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-d</strong></span>
</p>
<p>
Display database statistics for the specified file, as described in the
<a class="xref" href="dbstat.html" title="Db::stat()">Db::stat()</a> method.
</p>
<p>
If the database contains multiple databases and the <span class="bold"><strong>-s</strong></span> 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>-E</strong></span>
</p>
<p>
Display detailed information about the database environment.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-e</strong></span>
</p>
<p>
Display information about the database environment, including all
configured subsystems of the database environment.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-f</strong></span>
</p>
<p>
Display only those database statistics that can be acquired without
traversing the database.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-h</strong></span>
</p>
<p>
Specify a home directory for the database environment; by default, the
current working directory is used.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-l</strong></span>
</p>
<p>
Display logging subsystem statistics, as described in the
<a class="xref" href="logstat.html" title="DbEnv::log_stat()">DbEnv::log_stat()</a>
method.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-L</strong></span>
</p>
<p>
Display all logging subsystem statistics.
</p>
<div class="itemizedlist">
<ul type="circle">
<li>
<p>
<span class="bold"><strong>A</strong></span>
</p>
<p>
Display all information.
</p>
</li>
</ul>
</div>
</li>
<li>
<p>
<span class="bold"><strong>-M</strong></span>
</p>
<p>
Display detailed information about the cache.
</p>
<div class="itemizedlist">
<ul type="circle">
<li>
<p>
<span class="bold"><strong>A</strong></span>
</p>
<p>
Display all information.
</p>
</li>
<li>
<p>
<span class="bold"><strong>h</strong></span>
</p>
<p>
Display buffers within hash chains.
</p>
</li>
</ul>
</div>
</li>
<li>
<p>
<span class="bold"><strong>-m</strong></span>
</p>
<p>
Display cache statistics, as described in the
<a class="xref" href="mempstat.html" title="DbEnv::memp_stat()">DbEnv::memp_stat()</a>
method.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-N</strong></span>
</p>
<p>
Do not acquire shared region mutexes while running. Other problems,
such as potentially fatal errors in Berkeley DB, will be ignored as
well. This option is intended only for debugging errors, and should
not be used under any other circumstances.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-P</strong></span>
</p>
<p>
Specify an environment password. Although Berkeley DB utilities
overwrite password strings as soon as possible, be aware there may be
a window of vulnerability on systems where unprivileged users can see
command-line arguments or where utilities are not able to overwrite
the memory containing the command-line arguments.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-R</strong></span>
</p>
<p>
Display detailed information about the replication subsystem.
</p>
<div class="itemizedlist">
<ul type="circle">
<li>
<p>
<span class="bold"><strong>A</strong></span>
</p>
<p>
Display all information.
</p>
</li>
</ul>
</div>
</li>
<li>
<p>
<span class="bold"><strong>-r</strong></span>
</p>
<p>
Display replication statistics, as described in
in the <a class="xref" href="repstat.html" title="DbEnv::rep_stat()">DbEnv::rep_stat()</a>
method.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-s</strong></span>
</p>
<p>
Display statistics for the specified database contained in the file
specified with the <span class="bold"><strong>-d</strong></span> flag.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-t</strong></span>
</p>
<p>
Display transaction subsystem statistics, as described in the
<a class="xref" href="txnstat.html" title="DbEnv::txn_stat()">DbEnv::txn_stat()</a>
method.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-V</strong></span>
</p>
<p>
Write the library version number to the standard output, and exit.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-x</strong></span>
</p>
<p>
Display mutex subsystem statistics, as described in the
<a class="xref" href="mutexstat.html" title="DbEnv::mutex_stat()">DbEnv::mutex_stat()</a>
method.
</p>
</li>
<li>
<p>
<span class="bold"><strong>-Z</strong></span>
</p>
<p>
Reset the statistics after reporting them; valid only with the
<span class="bold"><strong>-C</strong></span>, <span class="bold"><strong>-c</strong></span>, <span class="bold"><strong>-E</strong></span>,
<span class="bold"><strong>-e</strong></span>, <span class="bold"><strong>-L</strong></span>, <span class="bold"><strong>-l</strong></span>,
<span class="bold"><strong>-M</strong></span>, <span class="bold"><strong>-m</strong></span>, <span class="bold"><strong>-R</strong></span>,
<span class="bold"><strong>-r</strong></span>, and <span class="bold"><strong>-t</strong></span> options.
</p>
</li>
</ul>
</div>
<p>
Values normally displayed in quantities of bytes are displayed as a
combination of gigabytes (GB), megabytes (MB), kilobytes (KB), and
bytes (B). Otherwise, values smaller than 10 million are displayed
without any special notation, and values larger than 10 million are
displayed as a number followed by "M".
</p>
<p>
The <span class="command"><strong>db_stat</strong></span> utility may be used with a Berkeley DB environment (as
described for the <span class="bold"><strong>-h</strong></span> option, the
environment variable <span class="bold"><strong>DB_HOME</strong></span>, or
because the utility was run in a directory containing a Berkeley DB
environment). In order to avoid environment corruption when using a
Berkeley DB environment, <span class="command"><strong>db_stat</strong></span> should always be given the chance to
detach from the environment and exit gracefully. To cause <span class="command"><strong>db_stat</strong></span> to
release all environment resources and exit cleanly, send it an
interrupt signal (SIGINT).
</p>
<p>
The <span class="command"><strong>db_stat</strong></span> utility exits 0 on success, and >0 if an error occurs.
</p>
<p>For information on the statistics feature for Berkeley DB SQL interface, see <a class="xref" href="dbsql.html#dbsql_command_feature" title="Command Line Features Unique to dbsql">Command Line Features Unique to dbsql</a>.</p>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="idp10912608"></a>Environment Variables</h3>
</div>
</div>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp10915056"></a>DB_HOME</h4>
</div>
</div>
</div>
<p>
If the <span class="bold"><strong>-h</strong></span> option is not specified and
the environment variable DB_HOME is set, it is used as the path of the
database home, as described in the
<a class="xref" href="envopen.html" title="DbEnv::open()">DbEnv::open()</a>
method.
</p>
</div>
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