NAME

       db5.1_checkpoint - Periodically checkpoint transactions

SYNOPSIS

       db5.1_checkpoint [-1Vv] [-h home] [-k kbytes] [-L file] [-P password] [-p min]

DESCRIPTION

       The  db5.1_checkpoint  utility  is  a  daemon  process that monitors the database log, and
       periodically calls DB_ENV->txn_checkpoint 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     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 db5.1_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 db5.1_checkpoint utility exits gracefully.

       -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 arguments.

       -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 exit.

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

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

       The  db5.1_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, db5.1_checkpoint should always be  given  the  chance  to
       detach from the environment and exit gracefully.  To cause db5.1_checkpoint to release all
       environment resources and exit cleanly, send it an interrupt signal (SIGINT).

       The db5.1_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  db5.1_checkpoint  utility  should  be
       started.

       The  DB_ENV->txn_checkpoint  method  is the underlying method used by the db5.1_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 db5.1_checkpoint 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.

AUTHORS

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

                                         28 January 2005                      DB5.1_CHECKPOINT(1)