db_stat
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db_stat [-celmNt]
[-C Acfhlmo] [-d file [-s file]] [-h home] [-M Ahlm]
Description
The db_stat utility displays statistics for Berkeley DB environments.
The options are as follows:
- -C
- Display internal information about the lock region.
(The output from this option is often both voluminous and meaningless,
and is intended only for debugging.)
- A
- Display all information.
- c
- Display lock conflict matrix.
- f
- Display lock and object free lists.
- l
- Display lockers within hash chains.
- m
- Display region memory information.
- o
- Display objects within hash chains.
- -c
- Display lock region statistics as described in lock_stat.
- -d
- Display database statistics for the specified database, as described in
DB->stat. If the database contains subdatabases, the statistics
are for the database or subdatabase specified, and not for the database
as a whole.
- -e
- Display current environment statistics.
- -h
- Specify a home directory for the database.
- -l
- Display log region statistics as described in log_stat.
- -M
- 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.)
- A
- Display all information.
- h
- Display buffers within hash chains.
- l
- Display buffers within LRU chains.
- m
- Display region memory information.
- -m
- Display shared memory buffer pool statistics as described in
memp_stat.
- -N
- 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.
- -s
- Display database statistics for the specified subdatabase of the
database specified with the -d flag.
- -t
- Display transaction region statistics as described in
txn_stat.
Only one set of statistics is displayed for each run, and the last option
specifying a set of statistics takes precedence.
Values smaller than 10 million are generally displayed without any special
notation. Values larger than 10 million are normally displayed as
<number>M.
The db_stat utility attaches to one or more of the Berkeley DB shared memory
regions. In order to avoid region corruption, it should always be given
the chance to detach and exit gracefully. To cause db_stat to clean up
after itself and exit, send it an interrupt signal (SIGINT).
The db_stat utility exits 0 on success, and >0 if an error occurs.
Environment Variables
- DB_HOME
- If the -h 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 DBENV->open.
See Also
db_archive,
db_checkpoint,
db_deadlock,
db_dump,
db_load,
db_recover,
and
db_stat.
Copyright Sleepycat Software