checkpoint man page on aLinux

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CHECKPOINT()			 SQL Commands			  CHECKPOINT()

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 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	  2005-11-05			  CHECKPOINT()
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