база данных MySQL и MariaDB PMDA (MySQL and MariaDB database PMDA)
Имя (Name)
pmdamysql - MySQL and MariaDB database PMDA
Описание (Description)
pmdamysql is a Performance Co-Pilot PMDA which extracts live
performance data from a running MySQL or MariaDB database.
Установка (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
Файлы (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
Окружение PCP (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).
Смотри также (See also)
PCPIntro(1), pmcd(1), pmdadbping(1), pmie(1) and DBI(3).
