MySQL Storage engine comparison

MySQL commonly used storage engine in 4 kinds, namely:MyISAM, InnoDB, memory, MERGE.

The difference between MySQL's common storage Engine:

1. MyISAM is the default storage engine for MySQL. MyISAM does not support transactions or foreign keys, but it has fast access and no requirement for transactional integrity.

2. The InnoDB storage Engine provides transactional security with commit, rollback, and crash resiliency. However, compared with the MyISAM storage engine, InnoDB writes are less efficient and consume more disk space to preserve data and indexes.

3. The memory storage engine creates a table using the contents of the existing content. Each memory meter only actually corresponds to one disk file. Memory Type table access is very fast because its data is placed in memory, and the hash index is used by default. But once the service is closed, the data in the table is lost.

4. The merge storage engine is a combination of a set of MyISAM tables that must have the same structure as the MyISAM tables. The merge table itself has no data, and the query, update, and delete operations on the merge type table are performed on the internal MyISAM table.

MySQL Storage engine comparison