pmdapostgresql(1) PostgreSQL database PMDA


pmdapostgresql is a Performance Co-Pilot PMDA which extracts live performance data from a running PostgreSQL database.


pmdapostgresql uses a configuration file from (in this order):
  • /etc/pcpdbi.conf
  • $PCP_PMDAS_DIR/postgresql/postgresql.conf
  • ./postgresql.conf

This file can contain overridden values (Perl code) for the settings listed at the start of, for example:

  • $database - database access method and database name, [default: 'dbi:Pg:dbname=postgres'] (see DBI(3) for details)
  • $username - username to connect to the database [default: 'postgres']
  • $password - password to connect to the database [default: '']
  • $os_user - operating system username (PMDA will run with the corresponding user id) [default: $username]

Once this is setup, you can access the names and values for the postgresql performance metrics by doing the following as root:

      # cd $PCP_PMDAS_DIR/postgresql

      # ./Install

To uninstall, do the following as root:

      # cd $PCP_PMDAS_DIR/postgresql

      # ./Remove

pmdapostgresql is launched by pmcd(1) and should never be executed directly. The Install and Remove scripts notify pmcd(1) when the agent is installed or removed.


configuration file for all PCP database monitors
configuration file for pmdapostgresql
installation script for the pmdapostgresql agent
undo installation script for the pmdapostgresql agent
default log file for error messages from pmdapostgresql


Environment variables with the prefix PCP_ are used to parameterize the file and directory names used by PCP. On each installation, the file /etc/pcp.conf contains the local values for these variables. The $PCP_CONF variable may be used to specify an alternative configuration file, as described in pcp.conf(5).