Check mysql-storage-engines

Overview

Checks storage engines, fragmented tables and autoindex usage in MySQL/MariaDB. Logic is taken from MySQLTuner script, v1.9.8.

Hints:

Fact Sheet

Check Plugin Download

https://github.com/Linuxfabrik/monitoring-plugins/tree/main/check-plugins/mysql-storage-engines

Check Interval Recommendation

Once a day

Can be called without parameters

Yes

Available for

Python 3, Windows

Requirements

Python module pymysql; User with no privileges, locked down to 127.0.0.1 - for example monitoring@127.0.0.1. Usernames in MySQL/MariaDB are limited to 16 chars in specific versions.

Help

usage: mysql-storage-engines [-h] [-V] [--always-ok] [-H HOSTNAME]
                             [-p PASSWORD] [--port PORT] [--timeout TIMEOUT]
                             [-u USERNAME]

Checks storage engines, fragmented tables and autoindex usage in
MySQL/MariaDB.

options:
  -h, --help            show this help message and exit
  -V, --version         show program's version number and exit
  --always-ok           Always returns OK.
  -H HOSTNAME, --hostname HOSTNAME
                        MySQL/MariaDB hostname. Default: 127.0.0.1
  -p PASSWORD, --password PASSWORD
                        Use the indicated password to authenticate the
                        connection. Default:
  --port PORT           MySQL/MariaDB port. Default: 3306
  --timeout TIMEOUT     Network timeout in seconds. Default: 3 (seconds)
  -u USERNAME, --username USERNAME
                        MySQL/MariaDB username. Default: root

Usage Examples

./mysql-storage-engines --hostname localhost --username root --password mypassword

Output:

There are warnings.

* 1 fragmented table
* OPTIMIZE TABLE `backup20190815`.`docs`; -- can free 2.6GiB
* Total freed space after all OPTIMIZE TABLEs: 2.6GiB
* accounting.contact has an autoincrement value near max capacity (97.0%)

States

  • WARN if InnoDB is enabled but isn’t being used

  • WARN if BDB is enabled but isn’t being used

  • WARN if MYISAM is enabled but isn’t being used

  • WARN if fragmented tables are found

  • WARN if a table’s autoincrement value is >= 75% max capacity

Perfdata / Metrics

There is no perfdata.

Troubleshooting

InnoDB is enabled but isn’t being used. Add skip-innodb to MySQL configuration to disable InnoDB

But InnoDB is enabled? You must use a user with the sufficiently high permissions to access the MySQL/MariaDB internals for this check to work properly.

Credits, License