1<!--$Id: db_stat.so,v 10.49 2008/03/26 15:45:51 mbrey Exp $--> 2<!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> 3<!--See the file LICENSE for redistribution information.--> 4<html> 5<head> 6<title>Berkeley DB: db_stat</title> 7<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> 8<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> 9</head> 10<body bgcolor=white> 11<table width="100%"><tr valign=top> 12<td> 13<b>db_stat</b> 14</td> 15</tr></table> 16<hr size=1 noshade> 17<tt> 18<b><pre>db_stat <b>-d</b> <b>file</b> [<b>-fN</b>] [<b>-h home</b>] [<b>-P password</b>] [<b>-s database</b>] 19db_stat [<b>-cEelmNrtVxZ</b>] [<b>-C Aclop</b>] [<b>-h home</b>] [<b>-L A</b>] [<b>-M A</b>] [<b>-R A</b>] [<b>-P password</b>]</pre></b> 20<b>Description</b> 21<a name="2"><!--meow--></a> 22<p>The db_stat utility displays statistics for Berkeley DB environments.</p> 23<p>The options are as follows:</p> 24<br> 25<b>-C</b><ul compact><li>Display detailed information about the locking subsystem. 26<br> 27<b>A</b><ul compact><li>Display all information.</ul> 28<b>c</b><ul compact><li>Display lock conflict matrix.</ul> 29<b>l</b><ul compact><li>Display lockers within hash chains.</ul> 30<b>o</b><ul compact><li>Display lock objects within hash chains.</ul> 31<b>p</b><ul compact><li>Display locking subsystem parameters.</ul> 32<br></ul> 33<b>-c</b><ul compact><li>Display locking subsystem statistics, as described in <a href="/api_c/lock_stat.html">DB_ENV->lock_stat</a>.</ul> 34<b>-d</b><ul compact><li>Display database statistics for the specified file, as described in 35<a href="/api_c/db_stat.html">DB->stat</a>. 36<p>If the database contains multiple databases and the <b>-s</b> flag is 37not specified, the statistics are for the internal database that describes 38the other databases the file contains, and not for the file as a whole.</p></ul> 39<b>-E</b><ul compact><li>Display detailed information about the database environment.</ul> 40<b>-e</b><ul compact><li>Display information about the database environment, including 41all configured subsystems of the database environment.</ul> 42<b>-f</b><ul compact><li>Display only those database statistics that can be 43acquired without traversing the database.</ul> 44<b>-h</b><ul compact><li>Specify a home directory for the database environment; by 45default, the current working directory is used.</ul> 46<b>-l</b><ul compact><li>Display logging subsystem statistics, as described in <a href="/api_c/log_stat.html">DB_ENV->log_stat</a>.</ul> 47<b>-M</b><ul compact><li>Display detailed information about the cache.</ul> 48<br> 49<b>A</b><ul compact><li>Display all information.</ul> 50<b>h</b><ul compact><li>Display buffers within hash chains.</ul> 51<br> 52<b>-m</b><ul compact><li>Display cache statistics, as described in <a href="/api_c/memp_stat.html">DB_ENV->memp_stat</a>.</ul> 53<b>-N</b><ul compact><li>Do not acquire shared region mutexes while running. Other problems, 54such as potentially fatal errors in Berkeley DB, will be ignored as well. 55This option is intended only for debugging errors, and should not be 56used under any other circumstances.</ul> 57<b>-P</b><ul compact><li>Specify an environment password. Although Berkeley DB utilities overwrite 58password strings as soon as possible, be aware there may be a window of 59vulnerability on systems where unprivileged users can see command-line 60arguments or where utilities are not able to overwrite the memory 61containing the command-line arguments.</ul> 62<b>-R</b><ul compact><li>Display detailed information about the replication subsystem.</ul> 63<br> 64<b>A</b><ul compact><li>Display all information.</ul> 65<br> 66<b>-r</b><ul compact><li>Display replication statistics, as described in <a href="/api_c/rep_stat.html">DB_ENV->rep_stat</a>.</ul> 67<b>-s</b><ul compact><li>Display statistics for the specified database contained in the file 68specified with the <b>-d</b> flag.</ul> 69<b>-t</b><ul compact><li>Display transaction subsystem statistics, as described in <a href="/api_c/txn_stat.html">DB_ENV->txn_stat</a>.</ul> 70<b>-V</b><ul compact><li>Write the library version number to the standard output, and exit.</ul> 71<b>-x</b><ul compact><li>Display mutex subsystem statistics, as described in <a href="/api_c/mutex_stat.html">DB_ENV->mutex_stat</a>.</ul> 72<b>-Z</b><ul compact><li>Reset the statistics after reporting them; valid only with the <b>-C</b>, 73<b>-c</b>, <b>-E</b>, <b>-e</b>, <b>-L</b>, <b>-l</b>, 74<b>-M</b>, <b>-m</b>, <b>-R</b>, <b>-r</b>, and <b>-t</b> 75options.</ul> 76<br> 77<p>Values normally displayed in quantities of bytes are displayed as a 78combination of gigabytes (GB), megabytes (MB), kilobytes (KB), and bytes 79(B). Otherwise, values smaller than 10 million are displayed without 80any special notation, and values larger than 10 million are displayed 81as a number followed by "M".</p> 82<p>The db_stat utility may be used with a Berkeley DB environment (as described for the 83<b>-h</b> option, the environment variable <b>DB_HOME</b>, or 84because the utility was run in a directory containing a Berkeley DB 85environment). In order to avoid environment corruption when using a 86Berkeley DB environment, db_stat should always be given the chance to 87detach from the environment and exit gracefully. To cause db_stat 88to release all environment resources and exit cleanly, send it an 89interrupt signal (SIGINT).</p> 90<p>The db_stat utility exits 0 on success, and >0 if an error occurs.</p> 91<br><b>Environment Variables</b> 92<br> 93<b>DB_HOME</b><ul compact><li>If the <b>-h</b> option is not specified and the environment variable 94DB_HOME is set, it is used as the path of the database home, as described 95in <a href="/api_c/env_open.html">DB_ENV->open</a>.</ul> 96<br> 97</tt> 98<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> 99</body> 100</html> 101