DESCRIPTION

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

INSTALLATION

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 pmdapostgresql.pl, 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.

FILES

/etc/pcpdbi.conf

configuration file for all PCP database monitors

$PCP_PMDAS_DIR/postgresql/postgresql.conf

configuration file for pmdapostgresql

$PCP_PMDAS_DIR/postgresql/Install

installation script for the pmdapostgresql agent

$PCP_PMDAS_DIR/postgresql/Remove

undo installation script for the pmdapostgresql agent

$PCP_LOG_DIR/pmcd/postgresql.log

default log file for error messages from pmdapostgresql

PCP ENVIRONMENT

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).