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db_stat(8)


NAME

  db_stat - Displays statistics for the database files (Enhanced Security)


SYNOPSIS

  /usr/tcb/bin/db_stat [-clmNt] [-C Acfhlmo] [-d file] [-h home] [-M Ahlm]


OPTIONS

  -C Acfhlmo
      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.

  -d  Display database statistics for the specified database.

  -h home
      Specify a home directory for the database. The correct directory for
      enhanced security is /var/tcb/files.

  -l  Display log region statistics.

  -M Ahlm
      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.

  -N  Do not acquire shared region locks while accumulating the statistics.
      This option is intended only for debugging corrupt regions and should
      not be used under any other circumstances.

  -t  Display transaction region statistics.


DESCRIPTION

  A customized version of the Berkeley Database (Berkeley DB) is embedded in
  the operating system to provide high-performance database support for
  critical security files. The DB includes full transactional support and
  database recovery, using write-ahead logging and checkpointing to record
  changes.

  The db_stat utility provides database statistics for these security files.
  Customization for Tru64 UNIX makes some of this information, particularly
  lock-related information, meaningless.

  Values smaller than 10 million are generally displayed without any special
  notation. Values larger than 10 million are normally displayed as M.

  The db_stat utility 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).


RETURN VALUES

  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. The home directory
      for security is /var/tcb/files.


FILES

  /var/tcb/files/auth.db

  /var/tcb/files/dblogs/*


SEE ALSO

  Commands: db_archive(8), db_checkpoint(8), db_printlog(8), db_dump(8),
  db_load(8), db_recover(8)

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