CHECKPOINT(7) PostgreSQL 9.1.9 Documentation CHECKPOINT(7)NAMECHECKPOINT - force a transaction log checkpoint
SYNOPSISCHECKPOINTDESCRIPTION
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 information in the log. All
data files will be flushed to disk. Refer to Chapter 29, Reliability
and the Write-Ahead Log, in the documentation for more information
about the WAL system.
If executed during recovery, the CHECKPOINT command will force a
restartpoint rather than writing a new checkpoint.
Only superusers can call CHECKPOINT. The command is not intended for
use during normal operation.
COMPATIBILITY
The CHECKPOINT command is a PostgreSQL language extension.
PostgreSQL 9.1.9 2013-04-01 CHECKPOINT(7)
