db_stat(1) - phpMan

DB_STAT(1)                             BerkeleyDB Utilities                            DB_STAT(1)



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 output from this
              option is often both voluminous and meaningless, and is intended  only  for  debug-
              ging.)

              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 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.

       -E     Display  internal information about the database environment, including all config-
              ured subsystems of the database environment.  (The output from this option is often
              both voluminous and meaningless, and is intended only for debugging.)

       -e     Display  information  about the database environment, including all configured sub-
              systems of the database environment.

       -f     Display only those database statistics that can be acquired without traversing  the
              database.

       -h home
              Specify  a  home  directory  for  the database environment; by default, 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  this  option  is
              often both voluminous and meaningless, and is intended only for 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 poten-
              tially 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 circum-
              stances.

       -P password
              Specify 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.

       -R     Display  internal  information  about  the replication subsystem.  (The output from
              this option is often both voluminous and meaningless,  and  is  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 file specified 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 -t options.

       Values  normally  displayed in quantities of bytes are displayed as a combination of giga-
       bytes (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).

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 variable DB_HOME is set, it
              is used as the path of the database home, as described in 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_ver-
       ify(1)



BerkeleyDB 5.3.21                        06 December 2016                              DB_STAT(1)

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