DBCHECKPOINT(1) BerkeleyDB Utilities DBCHECKPOINT(1)

NAME
       dbcheckpoint - Periodically checkpoint transactions

SYNOPSIS
       dbcheckpoint  [-1Vv] [-h home] [-k kbytes] [-L file] [-P password] [-p
       min]

DESCRIPTION
       The dbcheckpoint utility is a daemon process that monitors  the  data‐
       base  log,  and periodically calls DBENV->txncheckpoint to checkpoint
       it.

OPTIONS
       -1     Checkpoint the log once, regardless of whether or not there  has
              been activity since the last checkpoint and then exit.

       -h home
              Specify  a  home  directory  for  the  database  environment; by
              default, the current working directory is used.

       -k kbytes
              Checkpoint the database at least as often as every kbytes of log
              file are written.

       -L file
              Log  the execution of the dbcheckpoint utility to the specified
              file in the following format, where ### is the process  ID,  and
              the date is the time the utility was started.

              dbcheckpoint: ### Wed Jun 15 01:23:45 EDT 1995

              This  file  will  be  removed if the dbcheckpoint utility exits
              gracefully.

       -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  argu‐
              ments.

       -p min Checkpoint  the database at least every min minutes if there has
              been any activity since the last checkpoint.

       -V     Write the library version number to  the  standard  output,  and
              exit.

       -v     Write  the  time of each checkpoint attempt to the standard out‐
              put.

       At least one of the -1, -k, and -p options must be specified.

       The dbcheckpoint utility uses a Berkeley DB environment (as  described
       for  the  -h  option,  the environment variable DBHOME, 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 envi‐
       ronment, dbcheckpoint should always be given the chance to detach from
       the environment and exit gracefully.  To cause dbcheckpoint to release
       all environment resources and exit cleanly, send it an interrupt signal
       (SIGINT).

       The  dbcheckpoint  utility  does not attempt to create the Berkeley DB
       shared memory regions if they do not already  exist.   The  application
       that creates the region should be started first, and once the region is
       created, the dbcheckpoint utility should be started.

       The DBENV->txncheckpoint method is the underlying method used by  the
       dbcheckpoint utility. See the dbcheckpoint utility source code for an
       example of using  DBENV->txncheckpoint  in  a  IEEE/ANSI  Std  1003.1
       (POSIX) environment.

EXIT STATUS
       The  dbcheckpoint  utility  exits  0  on  success,  and >0 if an error
       occurs.

ENVIRONMENT
       DBHOME
              If the -h option is not specified and the  environment  variable
              DBHOME  is set, it is used as the path of the database home, as
              described in DBENV->open.

SEE ALSO
       dbarchive(1)  dbdeadlock(1)  dbdump(1)  dbhotbackup(1)  dblogver‐
       ify(1)    dbload(1)   dbprintlog(1)   dbrecover(1)   dbreplicate(1)
       dbstat(1) dbtuner(1) dbupgrade(1) dbverify(1)



BerkeleyDB 5.3.21              06 December 2016               DBCHECKPOINT(1)