'\" t
.\"     Title: CHECKPOINT
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 2018
.\"    Manual: PostgreSQL 10.4 Documentation
.\"    Source: PostgreSQL 10.4
.\"  Language: English
.\"
.TH "CHECKPOINT" "7" "2018" "PostgreSQL 10.4" "PostgreSQL 10.4 Documentation"
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.SH "NAME"
CHECKPOINT \- force a write\-ahead log checkpoint
.SH "SYNOPSIS"
.sp
.nf
CHECKPOINT
.fi
.SH "DESCRIPTION"
.PP
A checkpoint is a point in the write\-ahead 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
Section\ \&30.4
for more details about what happens during a checkpoint\&.
.PP
The
\fBCHECKPOINT\fR
command forces an immediate checkpoint when the command is issued, without waiting for a regular checkpoint scheduled by the system (controlled by the settings in
Section\ \&19.5.2)\&.
\fBCHECKPOINT\fR
is not intended for use during normal operation\&.
.PP
If executed during recovery, the
\fBCHECKPOINT\fR
command will force a restartpoint (see
Section\ \&30.4) rather than writing a new checkpoint\&.
.PP
Only superusers can call
\fBCHECKPOINT\fR\&.
.SH "COMPATIBILITY"
.PP
The
\fBCHECKPOINT\fR
command is a
PostgreSQL
language extension\&.