1PMDAMYSQL(1) General Commands Manual PMDAMYSQL(1)
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6 pmdamysql - MySQL and MariaDB database PMDA
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9 pmdamysql is a Performance Co-Pilot PMDA which extracts live perfor‐
10 mance data from a running MySQL or MariaDB database.
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13 pmdamysql uses a configuration file from (in this order):
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15 · /etc/pcpdbi.conf
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17 · $PCP_PMDAS_DIR/mysql/mysql.conf
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19 This file can contain overridden values (Perl code) for the settings
20 listed at the start of pmdamysql.pl, namely:
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22 · database name (see DBI(3) for details, default is
23 "DBI:mysql:mysql")
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25 · database username (default is "dbmonitor")
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27 · database password (default is "dbmonitor")
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29 · login account (default is "pcp")
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31 On some versions of MariaDB (10+) the performance schema is disabled by
32 default, and must be enabled for the PMDA to function. This is
33 achieved by adding the string "performance_schema" into the "[mysqld]"
34 section of the MariaDB configuration file (either my.cnf or my.ini).
35 The "SHOW ENGINES" SQL statement shows support for the performance
36 schema.
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38 Once these initial setup actions are complete, you can access the names
39 and values for the mysql performance metrics by doing the following as
40 root:
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42 # cd $PCP_PMDAS_DIR/mysql
43 # ./Install
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45 To uninstall, do the following as root:
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47 # cd $PCP_PMDAS_DIR/mysql
48 # ./Remove
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50 pmdamysql is launched by pmcd(1) and should never be executed directly.
51 The Install and Remove scripts notify pmcd(1) when the agent is
52 installed or removed.
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55 Some of the status values are in the form of YES/NO or ON/OFF.
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57 Since these cannot be interpreted by tools like pmie(1), they have been
58 duplicated with a _num extension and the values of 1 (YES/ON) or 0
59 (NO/OFF).
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61 Eg:
62 · mysql.slave_status.slave_io_running
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64 · mysql.slave_status.slave_io_running_num
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67 /etc/pcpdbi.conf
68 configuration file for all PCP database monitors
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70 $PCP_PMDAS_DIR/mysql/mysql.conf
71 configuration file for pmdamysql
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73 $PCP_PMDAS_DIR/mysql/Install
74 installation script for the pmdamysql agent
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76 $PCP_PMDAS_DIR/mysql/Remove
77 undo installation script for the pmdamysql agent
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79 $PCP_LOG_DIR/pmcd/mysql.log
80 default log file for error messages from pmdamysql
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83 Environment variables with the prefix PCP_ are used to parameterize the
84 file and directory names used by PCP. On each installation, the file
85 /etc/pcp.conf contains the local values for these variables. The
86 $PCP_CONF variable may be used to specify an alternative configuration
87 file, as described in pcp.conf(5).
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90 PCPIntro(1), pmcd(1), pmdadbping(1), pmie(1) and DBI(3).
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94Performance Co-Pilot PCP PMDAMYSQL(1)