Percona Toolkit is a collection of advanced open-source command-line tools developed to perform various MySQL tasks that are too difficult or complex to perform manually – freeing your DBAs for work that helps you achieve your business goals. I’ve been using this Tuning-primer version on Github, fully supporting MariaDB. The original script is no longer updated. This script takes information from “SHOW STATUS LIKE…” and “SHOW VARIABLES LIKE…” to produce sane recommendations for tuning server variables. MySQLTuner supports Galera Cluster, TokuDB, Performance schema, Linux OS metrics, InnoDB, MyISAM, Aria, etc. This script, written in Perl, will assist you with your MySQL configuration and make recommendations for increased performance and stability. Now, let’s look at popular scripts and tools for MySQL performance tuning: MySqlTuner, Tuning-Primer, MySQLreport, Percona Toolkit, and phpMyAdmin Advisor. For example, join_buffer_size is set to 4GB when the total DB size is less than 1GB. Meaning, that before you contact a professional to tune MySQL use these tuning scripts so that, at the very least, you don’t have any so-called embarrassing config in your my.cnf file. Scripts serve as essential guides, sometimes spot-on, but most times loose guides that will only solve the most grievous misconfigured parameters. You cannot replace Professional MySQL tuning with scripts. InnoDB supports transactions, foreign keys and relationship constraints MyISAM does not.Like MyISAM, InnoDB now has FULLTEXT search indexes as of MySQL 5.6.InnoDB has row-level locking MyISAM can only do full table-level locking.Versions of MySQL 5.5 and greater have switched to the InnoDB engine to ensure referential integrity constraints and higher concurrency.This is simple, use InnoDB and avoid MyISAM when possible. Always base your changes on benchmarks, comparisons, and time-tested firsthand data. When there’s doubt, stick with the defaults. When venturing to change MySQL’s defaults, it’s best to leave the default settings unless you have a basis for modifications. My advice is to always crosscheck your config changes with official documentation. There’s a ton of conflicting advice and opinions online. You will notice that both of the above blog posts reference or quote MySQL’s docs. Other than the tuning scripts listed below, try to avoid online advice unless it’s via or those that directly reference MySQL, Pecona’s, or MariaDB articles or documentation. They are both great options.īefore continuing, please look at the following MySQL performance tuning articles: MySQL Database Performance: Avoid this common mistake and note that due to the limitations of MySQL query cache, it has been deprecated as of MySQL 5.7.20 and is removed in MySQL 8.0. If you’ve seen notable improvements in using MariaDB or Percona over stock MySQL, please share your experience below. If you seek additional features or flexibility, you may already be using MariaDB or Percona, enhanced drop-in replacements for MySQL Server. Have a look at some version performance comparisons here. So the most important advice would be to upgrade, upgrade, upgrade. With each new version of MySQL released, there are substantial performance and feature enhancements over previous versions. Stay up to date with the latest MySQL server versions Therefore, the tips are additional links to popular free MySQL tuning scripts and tools. This can vary greatly case by case as there’s very little no one-size-fits-all advice. This post assumes that you’ve already optimized your queries and now seek guidance with selecting the best performance config options (ex: my.cnf) for MySQL. Be very cautious with recommended-settings based articles. Today, I won’t try to place any recommended config lines, values, or settings here. MySQL tuning is quite an expansive topic.
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