MAN page from Mandrake Other db-2.4.14-1.i386.rpm

DB_CHECKPOINT

Section: User Commands (1)
Updated: May 3, 1998
Index

NAME

db_checkpoint - the DB database checkpoint utility

SYNOPSIS

db_checkpoint [-1v] [-h home] [-k kbytes] [-L file] [-p min]

DESCRIPTION

Thedb_checkpointutility is a daemon process that monitors the database log and periodicallycallstxn_checkpoint(3)to checkpoint it.

The options are as follows:

-1: Checkpoint the log once, and then exit.
-h: Specify a home directory for the database.
-k: Checkpoint the database at least as often as everykbytesof log file are written.
-LLog the execution of the db_checkpoint utility to the specified file in thefollowing format, where ``###'' is the process ID, and the date isthe time the utility starting running. db_checkpoint: ### Wed Jun 15 01:23:45 EDT 1995 This file will be removed if the db_checkpoint utility exits gracefully.
-p: Checkpoint the database at least everyminminutes.
-v: Write the time of each checkpoint to the standard output.

At least one of the-1,-kand-poptions must be specified.

Thedb_checkpointutility attaches to DB shared memory regions.In order to avoid region corruption,it should always be given the chance to detach and exit gracefully.To causedb_checkpointto clean up after itself and exit,send it an interrupt signal (SIGINT).

Thedb_checkpointutility exits 0 on success, and >0 if an error occurs.

ENVIRONMENT VARIABLES

The following environment variables affect the execution ofdb_checkpoint:

DB_HOMEIf the-hoption is not specified and the environment variableDB_HOMEis set, it is used as the path of the database home, as described indb_appinit(3).

The DB library is a family of classes that provides a modularprogramming interface to transactions and record-oriented file access.The library includes support for transactions, locking, logging and filepage caching, as well as various indexed access methods.Many of the classes (e.g., the file page caching class)are useful independent of the other DB classes,although some classes are explicitly based on other classes(e.g., transactions and logging).For a general description of the DB package, seedb_intro(3).

db_archive(1),db_checkpoint(1),db_deadlock(1),db_dump(1),db_load(1),db_recover(1),db_stat(1),db_intro(3),db_internal(3),db_thread(3),Db(3),Dbc(3),DbEnv(3),DbException(3),DbInfo(3),DbLock(3),DbLockTab(3),DbLog(3),DbLsn(3),DbMpool(3),{DbMpoolFile(3),Dbt(3),DbTxn(3),DbTxnMgr(3)

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