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

The db_checkpoint utility is a daemon process that monitors the database log, and periodically calls DB_ENV->txn_checkpoint() to checkpoint it.

The options are as follows:

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

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

The db_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 db_checkpoint utility should be started.

The DB_ENV->txn_checkpoint() method is the underlying method used by the db_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 db_checkpoint utility exits 0 on success, and >0 if an error occurs.

Environment Variables


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 the DB_ENV->open() method.