'\" t
.\"     Title: pg_verify_checksums
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 2023
.\"    Manual: PostgreSQL 11.22 Documentation
.\"    Source: PostgreSQL 11.22
.\"  Language: English
.\"
.TH "PG_VERIFY_CHECKSUMS" "1" "2023" "PostgreSQL 11.22" "PostgreSQL 11.22 Documentation"
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.SH "NAME"
pg_verify_checksums \- verify data checksums in a PostgreSQL database cluster
.SH "SYNOPSIS"
.HP \w'\fBpg_verify_checksums\fR\ 'u
\fBpg_verify_checksums\fR [\fIoption\fR...] [[\fB\-D\fR | \fB\-\-pgdata\fR]\fI datadir\fR]
.SH "DESCRIPTION"
.PP
\fBpg_verify_checksums\fR
verifies data checksums in a
PostgreSQL
cluster\&. The server must be shut down cleanly before running
pg_verify_checksums\&. The exit status is zero if there are no checksum errors, otherwise nonzero\&.
.SH "OPTIONS"
.PP
The following command\-line options are available:
.PP
\fB\-D \fR\fB\fIdirectory\fR\fR
.br
\fB\-\-pgdata=\fR\fB\fIdirectory\fR\fR
.RS 4
Specifies the directory where the database cluster is stored\&.
.RE
.PP
\fB\-v\fR
.br
\fB\-\-verbose\fR
.RS 4
Enable verbose output\&. Lists all checked files\&.
.RE
.PP
\fB\-r \fR\fB\fIrelfilenode\fR\fR
.RS 4
Only validate checksums in the relation with specified relfilenode\&.
.RE
.PP
\fB\-V\fR
.br
\fB\-\-version\fR
.RS 4
Print the
pg_verify_checksums
version and exit\&.
.RE
.PP
\fB\-?\fR
.br
\fB\-\-help\fR
.RS 4
Show help about
pg_verify_checksums
command line arguments, and exit\&.
.RE
.SH "ENVIRONMENT"
.PP
\fBPGDATA\fR
.RS 4
Specifies the directory where the database cluster is stored; can be overridden using the
\fB\-D\fR
option\&.
.RE