pg\_controldata

pg\_controldata

1

Application

pg\_controldata

display control information of a

PostgreSQL

database cluster

pg\_controldata

option

-D

\--pgdata

datadir

Description {#r1-app-pgcontroldata-1}
===========

`pg_controldata` prints information initialized during `initdb`, such as
the catalog version. It also shows information about write-ahead logging
and checkpoint processing. This information is cluster-wide, and not
specific to any one database.

This utility can only be run by the user who initialized the cluster
because it requires read access to the data directory. You can specify
the data directory on the command line, or use the environment variable
PGDATA. This utility supports the options `-V` and `--version`, which
print the pg\_controldata version and exit. It also supports options
`-?` and `--help`, which output the supported arguments.

Environment
===========

PGDATA

:   Default data directory location

PG\_COLOR

:   Specifies whether to use color in diagnostic messages. Possible
    values are `always`, `auto` and `never`.
