MyISAM
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.
Until MariaDB 10.4, system tables used the MyISAM storage engine.
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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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