Description
pg_controldata returns information initialized during
initdb, such as the catalog version and server locale.
It also shows information about write-ahead logging and checkpoint
processing. This information is server-wide, and not specific to any one
database.
This utility may only be run by the user who installed the server because
it requires read access to the datadir.
You can specify the data directory on the command line, or use
the environment variable PGDATA.
