MyISAM was the default storage engine from MySQL 3.23 until it was replaced by InnoDB in MariaDB and MySQL 5.5. It's a light, non-transactional engine with great performance, is easy to copy between systems and has a small data footprint.
You're encouraged to rather use the Aria storage engine for new applications, which has even better performance and the goal of being crash-safe.
|MyISAM Overview||Light, non-transactional storage engine|
|MyISAM System Variables||MyISAM system variables.|
|MyISAM Storage Formats||The MyISAM storage engine supports three different table storage formats|
|MyISAM Clients and Utilities||Clients and utilities for working with MyISAM tables|
|MyISAM Index Storage Space||Regular MyISAM tables make use of B-tree indexes|
|MyISAM Log||Records all changes to MyISAM tables|
|Concurrent Inserts||Under some circumstances, MyISAM allows INSERTs and SELECTs to be executed concurrently|
|Segmented Key Cache||Collection of structures for regular MyISAM key caches|
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