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       db4.7_checkpoint - Periodically checkpoint transactions


       db4.7_checkpoint  [-1Vv]  [-h home] [-k kbytes] [-L file] [-P password]
       [-p min]


       The db4.7_checkpoint utility is a  daemon  process  that  monitors  the
       database   log,   and   periodically  calls  DB_ENV->txn_checkpoint  to
       checkpoint it.


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

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

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

       -L     Log  the  execution  of  the  db4.7_checkpoint  utility  to  the
              specified file in the following format, where ### is the process
              ID, and the date is the time the utility was started.

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

              This  file will be removed if the db4.7_checkpoint utility exits

       -P     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

       -p     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

       -v     Write  the  time  of  each  checkpoint  attempt  to the standard

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

       The  db4.7_checkpoint  utility  uses  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, db4.7_checkpoint should always  be  given  the
       chance  to  detach  from the environment and exit gracefully.  To cause
       db4.7_checkpoint to release all environment resources and exit cleanly,
       send it an interrupt signal (SIGINT).

       The db4.7_checkpoint 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 db4.7_checkpoint utility should be started.

       The DB_ENV->txn_checkpoint method is the underlying method used by  the
       db4.7_checkpoint utility. See the db_checkpoint utility source code for
       an example of using DB_ENV->txn_checkpoint in a  IEEE/ANSI  Std  1003.1
       (POSIX) environment.

       The  db4.7_checkpoint  utility  exits  0 on success, and >0 if an error


              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.


       Sleepycat Software, Inc. This manual page was created based on the HTML
       documentation  for  db_checkpoint  from  Sleepycat,  by Thijs Kinkhorst
       <>, for the  Debian  system  (but  may  be  used  by

                                28 January 2005