CHECKPOINT(7)                                             SQL Commands                                             CHECKPOINT(7)



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_timeout.)  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 informa-
       tion in the log. All data files will be flushed to disk. Refer to in the documentation for more information about the WAL
       system.

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

COMPATIBILITY
       The CHECKPOINT command is a PostgreSQL language extension.



SQL - Language Statements                                  2011-09-22                                              CHECKPOINT(7)