Berkeley DB: db

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Berkeley DB: db_stat

db_stat

db_stat -d file [-fN] [-h home] [-P password] [-s database] db_stat [-cEelmNrtVxZ] [-C Aclop] [-h home] [-L A] [-M A] [-R A] [-P password] Description The db_stat utility displays statistics for Berkeley DB environments. The options are as follows: -CDisplay detailed information about the locking subsystem. ADisplay all information. cDisplay lock conflict matrix. lDisplay lockers within hash chains. oDisplay lock objects within hash chains. pDisplay locking subsystem parameters. -cDisplay locking subsystem statistics, as described in DB_ENV->lock_stat. -dDisplay database statistics for the specified file, as described in DB->stat. If the database contains multiple databases and the -s 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. -EDisplay detailed information about the database environment. -eDisplay information about the database environment, including all configured subsystems of the database environment. -fDisplay only those database statistics that can be acquired without traversing the database. -hSpecify a home directory for the database environment; by default, the current working directory is used. -lDisplay logging subsystem statistics, as described in DB_ENV->log_stat. -MDisplay detailed information about the cache. ADisplay all information. hDisplay buffers within hash chains. -mDisplay cache statistics, as described in DB_ENV->memp_stat. -NDo 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 be used under any other circumstances. -PSpecify an environment password. Although Berkeley DB utilities overwrite password strings as soon as possible, be aware there may be a window of vulnerability on systems where unprivileged users can see command-line arguments or where utilities are not able to overwrite the memory containing the command-line arguments. -RDisplay detailed information about the replication subsystem. ADisplay all information. -rDisplay replication statistics, as described in DB_ENV->rep_stat. -sDisplay statistics for the specified database contained in the file specified with the -d flag. -tDisplay transaction subsystem statistics, as described in DB_ENV->txn_stat. -VWrite the library version number to the standard output, and exit. -xDisplay mutex subsystem statistics, as described in DB_ENV->mutex_stat. -ZReset the statistics after reporting them; valid only with the -C, -c, -E, -e, -L, -l, -M, -m, -R, -r, and -t options. Values normally displayed in quantities of bytes are displayed as a combination of gigabytes (GB), megabytes (MB), kilobytes (KB), and bytes (B). Otherwise, values smaller than 10 million are displayed without any special notation, and values larger than 10 million are displayed as 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, 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). The db_stat utility exits 0 on success, and >0 if an error occurs. Environment Variables DB_HOMEIf 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 DB_ENV->open.