pmdaoracle(1) — Linux manual page


PMDAORACLE(1)            General Commands Manual           PMDAORACLE(1)

NAME         top

       pmdaoracle - Oracle database PMDA

DESCRIPTION         top

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

INSTALLATION         top

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

       This file can contain overridden values (Perl code) for the
       settings listed at the start of, for example:
       •   $username - username to connect to the database [default:
       •   $password - password to connect to the database [default:
       •   $host - host the database is running on [default:
       •   $port - port the database is listening on [default: '1521']
       •   $os_user - operating system username (PMDA will run with the
           corresponding user id) [default: oracle]
       •   @sids - an array of $ORACLE_SID database identifiers
           [default: ('master')]

       In order to test your local settings, a simple script is provided
       that will connect and disconnect from the database - verifying
       fundamental configuration is in place before continuing on.  If
       the $PCP_PMDAS_DIR/oracle/ script cannot connect, do
       not proceed with installation of the PMDA as it will be
       unsuccessful.  Correct your local settings first.

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

           # cd $PCP_PMDAS_DIR/oracle
           # ./Install

       To uninstall, the following must be done as root:

           # cd $PCP_PMDAS_DIR/oracle
           # ./Remove

       pmdaoracle 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.


       By default, pmdaoracle will aggressively attempt to maintain
       persistent connections to Oracle to ensure timely responses to
       its queries, and will automatically re-connect if a connection

       However, in certain circumstances this may be undesirable, so a
       manual pmStore(3) mechanism is provided to explicitly control
       disconnecting and reconnecting to an Oracle instance.  This can
       be used, for example, to ensure that pmdaoracle is not connected
       at shutdown, to ensure a clean Oracle shutdown process.

       The pmstore(1) command can be used to disconnect and reconnect.
       Using the individual instances of the oracle.control.connected
       metric, one can set the connection state to either up (1) or down
       (0).  Additionally, pminfo(1) can report on the current status of
       Oracle connections.

            # pminfo ‐f oracle.control.connected

                inst [0 or "master"] value 1

            # pmstore oracle.control.connected 0
            oracle.control.connected inst [0 or "master"] old value=1 new value=0

FILES         top

           configuration file for all PCP database monitors
           configuration file for pmdaoracle
           example configuration file for pmdaoracle using
           configuration test script for Oracle database connectivity
           installation script for the pmdaoracle agent
           undo installation script for the pmdaoracle agent
           default log file for error messages from pmdaoracle


       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

SEE ALSO         top

       PCPIntro(1), pmdadbping(1), pminfo(1), pmstore(1), DBI(3) and

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at 
       ⟨⟩.  If you have a bug report for this manual
       page, send it to  This page was obtained from the
       project's upstream Git repository
       ⟨⟩ on 2023-12-22.
       (At that time, the date of the most recent commit that was found
       in the repository was 2023-12-16.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

Performance Co-Pilot               PCP                     PMDAORACLE(1)