pg_controldata
pg_controldata — display control information of aPostgreSQL database cluster
Synopsis
pg_controldata [option] [[-D |--pgdata ]datadir]
Description
pg_controldata prints information initialized duringinitdb, 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 variablePGDATA. This utility supports the options-V and--version, which print thepg_controldata version and exit. It also supports options-? and--help, which output the supported arguments.
Environment
PGDATADefault data directory location
PG_COLORSpecifies whether to use color in diagnostic messages. Possible values are
always,autoandnever.