MAN page from Fedora 28 libdb-utils-5.3.28-30.fc28.x86_64.rpm
DB_STAT
Section: BerkeleyDB Utilities (1)
Updated: 06 December 2016
Index NAME
db_stat - Display environment statistics
SYNOPSIS
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]
DESCRIPTION
The
db_stat utility displays statistics for Berkeley DB environments.
OPTIONS
- -C
- Display internal information about the locking subsystem. (The outputfrom this option is often both voluminous and meaningless, and isintended only for debugging.)
- A
- Display all information.
- c
- Display lock conflict matrix.
- l
- Display lockers within hash chains.
- o
- Display lock objects within hash chains.
- p
- Display locking subsystem parameters.
- -c
- Display locking subsystem statistics, as described in DB_ENV->lock_stat.
- -d
- Display database statistics for the specified file, as described inDB->stat.
If the database contains multiple databases and the -s flag isnot specified, the statistics are for the internal database that describesthe other databases the file contains, and not for the file as a whole.
- -E
- Display internal information about the database environment, includingall configured subsystems of the database environment. (Theoutput from this option is often both voluminous and meaningless, andis intended only for debugging.)
- -e
- Display information about the database environment, includingall configured subsystems of the database environment.
- -f
- Display only those database statistics that can beacquired without traversing the database.
- -h home
- Specify a home directory for the database environment; bydefault, the current working directory is used.
- -l
- Display logging subsystem statistics, as described in DB_ENV->log_stat.
- -L
- Display all logging subsystem statistics.
- A
- Display all information.
- -M
- Display internal information about the cache. (The output from thisoption is often both voluminous and meaningless, and is intended onlyfor debugging.)
- A
- Display all information.
- h
- Display buffers within hash chains.
- -m
- Display cache statistics, as described in DB_ENV->memp_stat.
- -N
- 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 beused under any other circumstances.
- -P password
- Specify an environment password. Although Berkeley DB utilities overwritepassword strings as soon as possible, be aware there may be a window ofvulnerability on systems where unprivileged users can see command-linearguments or where utilities are not able to overwrite the memorycontaining the command-line arguments.
- -R
- Display internal information about the replication subsystem. (Theoutput from this option is often both voluminous and meaningless, andis intended only for debugging.)
- A
- Display all information.
- -r
- Display replication statistics, as described in DB_ENV->rep_stat.
- -s database
- Display statistics for the specified database contained in the filespecified with the -d flag.
- -t
- Display transaction subsystem statistics, as described in DB_ENV->txn_stat.
- -V
- Write the library version number to the standard output, and exit.
- -x
- Display mutex subsystem statistics, as described in the DB_ENV->mutex_stat method.
- -Z
- Reset the statistics after reporting them; valid only with the -C,-c, -E, -e, -L, -l,-M, -m, -R, -r, and -toptions.
Values normally displayed in quantities of bytes are displayed as acombination of gigabytes (GB), megabytes (MB), kilobytes (KB), and bytes(B). Otherwise, values smaller than 10 million are displayed withoutany special notation, and values larger than 10 million are displayedas a number followed by "M".
The db_stat utility may be used with a Berkeley DB environment (as described for the-h option, the environment variable DB_HOME, orbecause the utility was run in a directory containing a Berkeley DBenvironment). In order to avoid environment corruption when using aBerkeley DB environment, db_stat should always be given the chance todetach from the environment and exit gracefully. To cause db_statto release all environment resources and exit cleanly, send it aninterrupt signal (SIGINT).
EXIT STATUS
The
db_stat utility exits 0 on success, and >0 if an error occurs.
ENVIRONMENT
- DB_HOME
- If the -h option is not specified and the environment variableDB_HOME is set, it is used as the path of the database home, as describedin DB_ENV->open.
SEE ALSO
db_archive(1)
db_checkpoint(1)
db_deadlock(1)
db_dump(1)
db_hotbackup(1)
db_log_verify(1)
db_load(1)
db_printlog(1)
db_recover(1)
db_replicate(1)
db_tuner(1)
db_upgrade(1)
db_verify(1)
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- OPTIONS
- EXIT STATUS
- ENVIRONMENT
- SEE ALSO
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