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'\" t
.\" Title: CHECKPOINT
.\" Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\" Date: 2022
.\" Manual: PostgreSQL 14.5 Documentation
.\" Source: PostgreSQL 14.5
.\" Language: English
.\"
.TH "CHECKPOINT" "7" "2022" "PostgreSQL 14.5" "PostgreSQL 14.5 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\ \&30.5
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\ \&20.5.2)\&.
\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\ \&30.5) 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\&.
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