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<!--$Id: stat.so,v 10.17 2000/12/18 21:05:14 bostic Exp $-->
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<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.-->
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<html>
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<head>
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<title>Berkeley DB Reference Guide: Database statistics</title>
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<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
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<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++">
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<body bgcolor=white>
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<a name="2"><!--meow--></a>
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<table><tr valign=top>
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<td><h3><dl><dt>Berkeley DB Reference Guide:<dd>Access Methods</dl></h3></td>
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<td width="1%"><a href="../../ref/am/sync.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../ref/toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/am/close.html"><img src="../../images/next.gif" alt="Next"></a>
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</td></tr></table>
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<p>
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<h1 align=center>Database statistics</h1>
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<p>The <a href="../../api_c/db_stat.html">DB->stat</a> function is the standard interface for obtaining database
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statistics. Generally, <a href="../../api_c/db_stat.html">DB->stat</a> returns a set of statistics
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about the underlying database, e.g., the number of key/data pairs in
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the database, how the database was originally configured, and so on.
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<p>There are two flags that you can set to customize the returned statistics:
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<p><dl compact>
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<p><dt><a href="../../api_c/db_stat.html#DB_CACHED_COUNTS">DB_CACHED_COUNTS</a><dd>Request an approximate key and key/data pair count. As obtaining an
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exact count can be very performance intensive for large databases,
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it is possible to request a previously cached count. Obviously, the
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cached count is only an approximate count, and may be out-of-date.
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<p><dt><a href="../../api_c/db_stat.html#DB_RECORDCOUNT">DB_RECORDCOUNT</a><dd>If the database is a Queue or Recno database, or a Btree database that
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was configured so that it is possible to search it by logical record
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number, return only a count of the records in the database.
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</dl>
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<table><tr><td><br></td><td width="1%"><a href="../../ref/am/sync.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../ref/toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/am/close.html"><img src="../../images/next.gif" alt="Next"></a>
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<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font>
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