Documentation Home
MySQL 5.6 Reference Manual
Related Documentation Download this Manual
PDF (US Ltr) - 29.4Mb
PDF (A4) - 29.5Mb
Man Pages (TGZ) - 190.3Kb
Man Pages (Zip) - 305.1Kb
Info (Gzip) - 2.8Mb
Info (Zip) - 2.8Mb
Excerpts from this Manual

14.7.2 InnoDB Transaction Model

The InnoDB transaction model aims combine the best properties of a multi-versioning database with traditional two-phase locking. InnoDB performs locking at the row level and runs queries as nonlocking consistent reads by default, in the style of Oracle. The lock information in InnoDB is stored space-efficiently so that lock escalation is not needed. Typically, several users are permitted to lock every row in InnoDB tables, or any random subset of the rows, without causing InnoDB memory exhaustion.