Configuring MariaDB for Optimal Performance

This article is to help you configure MariaDB for optimal performance.

Note that by default MariaDB is configured to work on a desktop system and should because of this not take a lot of resources. To get things to work for a dedicated server, you have to do a few minutes of work.

For this article we assume that you are going to run MariaDB on a dedicated server.

Feel free to update this article if you have more ideas.

my.cnf Files

MariaDB is normally configured by editing the my.cnf file. In the next section you have a list of variables that you may want to configure for dedicated MariaDB servers.

InnoDB Storage Engine

InnoDB is normally the default storage engine with MariaDB.

  • You should set innodb_buffer_pool_size to about 80% of your memory. The goal is to ensure that 80 % of your working set is in memory.

The other most important InnoDB variables are:

Some other important InnoDB variables:

Aria Storage Engine

  • MariaDB uses by default the Aria storage engine for internal temporary files. If you have many temporary files, you should set aria_pagecache_buffer_size to a reasonably large value so that temporary overflow data is not flushed to disk. The default is 128M.


  • If you don't use MyISAM tables explicitly (true for most MariaDB 10.4+ users), you can set key_buffer_size to a very low value, like 64K.

Lots of Connections

A Lot of Fast Connections + Small Set of Queries + Disconnects

  • If you are doing a lot of fast connections / disconnects, you should increase back_log and if you are running MariaDB 10.1 or below thread_cache_size.
  • If you have a lot (> 128) of simultaneous running fast queries, you should consider setting thread_handling to pool_of_threads.

Connecting From a Lot of Different Machines

  • If you are connecting from a lot of different machines you should increase host_cache_size to the max number of machines (default 128) to cache the resolving of hostnames. If you don't connect from a lot of machines, you can set this to a very low value!

See Also


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