pmdapostgresql man page

pmdapostgresql — PostgreSQL database PMDA

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).

See Also

PCPIntro(1), pmdadbping(1) and DBI(3).

Info

PCP Performance Co-Pilot