pg_controldata1Applicationpg_controldatadisplay control information of a PostgreSQL database clusterpg_controldatapg_controldataoptiondatadirDescriptionpg_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
EnvironmentPGDATA
Default data directory location