13.5. The MyISAM Storage Engine
MyISAM is the default storage engine. It is based on the older ISAM code but has many useful extensions. (Note that MySQL 5.4 does not support ISAM.)
Table 13.2. MyISAM Storage Engine Features
Storage limits 256TB Transactions No Locking granularity Table
MVCC No Geospatial datatype support Yes Geospatial indexing support Yes
B-tree indexes Yes Hash indexes No Full-text search indexes Yes
Clustered indexes No Data caches No Index caches Yes
Compressed data Yes[a] Encrypted data[b] Yes Cluster database support No
Replication support[c] Yes Foreign key support No Backup / point-in-time recovery[d] Yes
Query cache support Yes Update statistics for data dictionary Yes