CHECKPOINT(l)

NAME

       CHECKPOINT - force a transaction log checkpoint

SYNOPSIS

       CHECKPOINT

DESCRIPTION

       Write-Ahead  Logging  (WAL)  puts  a  checkpoint in the transaction log
       every so often. (To adjust the automatic checkpoint interval,  see  the
       run-time configuration options checkpoint_segments and checkpoint_time-
       out.)  The CHECKPOINT command forces an immediate checkpoint  when  the
       command is issued, without waiting for a scheduled checkpoint.

       A  checkpoint  is  a point in the transaction log sequence at which all
       data files have been updated to reflect the information in the log. All
       data  files  will  be  flushed to disk. Refer to the the chapter called
       ``Write-Ahead Logging'' in the documentation for more information about
       the WAL system.

       Only  superusers  may  call CHECKPOINT. The command is not intended for
       use during normal operation.

COMPATIBILITY

       The CHECKPOINT command is a PostgreSQL language extension.

SQL - Language Statements         2003-11-02                     CHECKPOINT(l)