NAME

       pmdamysql - MySQL and MariaDB database PMDA

DESCRIPTION

       pmdamysql  is  a  Performance  Co-Pilot PMDA which extracts live performance data from a running MySQL or
       MariaDB database.

INSTALLATION

       pmdamysql uses a configuration file from (in this order):

       •   /etc/pcpdbi.conf

       •   $PCP_PMDAS_DIR/mysql/mysql.conf

       This file can contain overridden values (Perl code) for the settings listed at the start of pmdamysql.pl,
       namely:

       •   database name (see DBI(3) for details, default is "DBI:mysql:mysql")

       •   database username (default is "dbmonitor")

       •   database password (default is "dbmonitor")

       •   login account (default is "pcp")

       On some versions of MariaDB (10+) the performance schema is disabled by default, and must be enabled  for
       the  PMDA  to  function.   This is achieved by adding the string "performance_schema" into the "[mysqld]"
       section of the MariaDB configuration file (either my.cnf or my.ini).  The "SHOW  ENGINES"  SQL  statement
       shows support for the performance schema.

       Once  these  initial  setup  actions  are  complete,  you  can  access the names and values for the mysql
       performance metrics by doing the following as root:

           # cd $PCP_PMDAS_DIR/mysql
           # ./Install

       To uninstall, the following must be done as root:

           # cd $PCP_PMDAS_DIR/mysql
           # ./Remove

       pmdamysql 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.

Binary Status values in text

       Some of the status values are in the form of YES/NO or ON/OFF.

       Since  these cannot be interpreted by tools like pmie(1), they have been duplicated with a _num extension
       and the values of 1 (YES/ON) or 0 (NO/OFF).

   Eg:
       •   mysql.slave_status.slave_io_running

       •   mysql.slave_status.slave_io_running_num

FILES

       /etc/pcpdbi.conf
           configuration file for all PCP database monitors

       $PCP_PMDAS_DIR/mysql/mysql.conf
           configuration file for pmdamysql

       $PCP_PMDAS_DIR/mysql/Install
           installation script for the pmdamysql agent

       $PCP_PMDAS_DIR/mysql/Remove
           undo installation script for the pmdamysql agent

       $PCP_LOG_DIR/pmcd/mysql.log
           default log file for error messages from pmdamysql

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), pmcd(1), pmdadbping(1), pmie(1) and DBI(3).

Performance Co-Pilot                                   PCP                                          PMDAMYSQL(1)