<!--$Id: db_stat.so,v 10.31 2001/09/27 02:25:52 bostic Exp $-->
<!--Copyright 1997-2001 by Sleepycat Software, Inc.-->
<!--All rights reserved.-->
<html>
<head>
<title>Berkeley DB: db_stat</title>
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++">
</head>
<body bgcolor=white>
<a name="2"><!--meow--></a>
<table width="100%"><tr valign=top>
<td>
<h1>db_stat</h1>
</td>
<td align=right>
<a href="../../db4-devel-4.0.14/api_c/c_index.html"><img src="../../db4-4.0.14/images/api.gif" alt="API"></a><a href="../reftoc.html"><img src="../../db4-4.0.14/images/ref.gif" alt="Ref"></a>
</td></tr></table>
<hr size=1 noshade>
<tt>
<h3><pre>db_stat [<b>-celmNtVZ</b>]
[<b>-C Acfhlmo</b>] [<b>-d file [<b>-f fast</b>] [<b>-s database</b>]</b>] [<b>-h home</b>] [<b>-M Ahlm</b>]</pre></h3>
<h1>Description</h1>
<a name="3"><!--meow--></a>
<p>The db_stat utility displays statistics for Berkeley DB environments.
<p>The options are as follows:
<p><dl compact>
<p><dt><b>-C</b><dd>Display internal information about the lock region. (The output from this
option is often both voluminous and meaningless, and is intended only for
debugging.)
<p><dl compact>
<p><dt>A<dd>Display all information.
<dt>c<dd>Display lock conflict matrix.
<dt>f<dd>Display lock and object free lists.
<dt>l<dd>Display lockers within hash chains.
<dt>m<dd>Display region memory information.
<dt>o<dd>Display objects within hash chains.
</dl>
<p><dt><b>-c</b><dd>Display lock region statistics, as described in <a href="../../db4-devel-4.0.14/api_c/lock_stat.html">DB_ENV->lock_stat</a>.
<p><dt><b>-d</b><dd>Display database statistics for the specified file, as described in
<a href="../../db4-devel-4.0.14/api_c/db_stat.html">DB->stat</a>.
<p>If the database contains multiple databases and the <b>-s</b> 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><dt><b>-e</b><dd>Display current environment statistics.
<p><dt><b>-f</b><dd>Display only those database statistics that can be
acquired without traversing the database.
<p><dt><b>-h</b><dd>Specify a home directory for the database environment; by
default, the current working directory is used.
<p><dt><b>-l</b><dd>Display log region statistics, as described in <a href="../../db4-devel-4.0.14/api_c/log_stat.html">DB_ENV->log_stat</a>.
<p><dt><b>-M</b><dd>Display internal information about the shared memory buffer pool. (The
output from this option is often both voluminous and meaningless, and is
intended only for debugging.)
<p><dl compact>
<p><dt>A<dd>Display all information.
<dt>h<dd>Display buffers within hash chains.
<dt>l<dd>Display buffers within LRU chains.
<dt>m<dd>Display region memory information.
</dl>
<p><dt><b>-m</b><dd>Display shared memory buffer pool statistics, as described in
<a href="../../db4-devel-4.0.14/api_c/memp_stat.html">DB_ENV->memp_stat</a>.
<p><dt><b>-N</b><dd>Do not acquire shared region locks 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><dt><b>-s</b><dd>Display statistics for the specified database contained in the file
specified with the <b>-d</b> flag.
<p><dt><b>-t</b><dd>Display transaction region statistics, as described in <a href="../../db4-devel-4.0.14/api_c/txn_stat.html">DB_ENV->txn_stat</a>.
<p><dt><b>-V</b><dd>Write the library version number to the standard output, and exit.
<p><dt><b>-Z</b><dd>Reset the statistics after reporting them; valid only with the
<b>-c</b>, <b>-e</b>, <b>-l</b>, <b>-m</b>, and <b>-t</b>
options.
</dl>
<p>Values smaller than 10 million are generally displayed without any special
notation. Values larger than 10 million are normally displayed as
<b><number>M</b>.
<p>The db_stat utility may be used with a Berkeley DB environment (as described for the
<b>-h</b> option, the environment variable <b>DB_HOME</b>, 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, db_stat should always be given the chance to
detach from the environment and exit gracefully. To cause db_stat
to release all environment resources and exit cleanly, send it an
interrupt signal (SIGINT).
<p>The db_stat utility exits 0 on success, and >0 if an error occurs.
<h1>Environment Variables</h1>
<p><dl compact>
<p><dt>DB_HOME<dd>If the <b>-h</b> 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 <a href="../../db4-devel-4.0.14/api_c/env_open.html">DB_ENV->open</a>.
</dl>
<h1>See Also</h1>
<a href="../../db4-4.0.14/utility/berkeley_db_svc.html">berkeley_db_svc</a>,
<a href="../../db4-4.0.14/utility/db_archive.html">db_archive</a>,
<a href="../../db4-4.0.14/utility/db_checkpoint.html">db_checkpoint</a>,
<a href="../../db4-4.0.14/utility/db_deadlock.html">db_deadlock</a>,
<a href="../../db4-4.0.14/utility/db_dump.html">db_dump</a>,
<a href="../../db4-4.0.14/utility/db_load.html">db_load</a>,
<a href="../../db4-4.0.14/utility/db_recover.html">db_recover</a>,
db_stat,
<a href="../../db4-4.0.14/utility/db_upgrade.html">db_upgrade</a>,
and
<a href="../../db4-4.0.14/utility/db_verify.html">db_verify</a>.
</tt>
<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font>
</body>
</html>
