Saturday 7 May 2011

MySQL 5.5.12 / 5.1.57

Multi-user and robust SQL database server

MySQL is a very fast, multi-user, multi-threaded and robust SQL (Structured Query Language) database server.


MySQL is an attractive alternative to higher-cost, more complex database technology. Its award-winning speed, scalability and reliability make it the right choice for corporate IT departments, Web developers and packaged software vendors.
What's New in This Release: [ read full changelog ]


Functionality added or changed:

· When invoked with the --auto-generate-sql option, mysqlslap dropped the schema specified with the --create-schema option at the end of the test run, which may have been unexpected by the user. mysqlslap no longer drops the schema, but has a new --create-and-drop-schema schema that both creates and drops a schema. (Bug #58090, Bug #11765157)


Bugs fixed:

· InnoDB Storage Engine: Replication: Trying to update a column, previously set to NULL, of an InnoDB table with no primary key caused replication to fail with Can't find record in 'table' on the slave. (Bug #11766865, Bug #60091)


· InnoDB Storage Engine: The server could halt if InnoDB interpreted a very heavy I/O load for 15 minutes or more as an indication that the server was hung. This change fixes the logic that measures how long InnoDB threads were waiting, which formerly could produce false positives. (Bug #11877216, Bug #11755413, Bug #47183)


· InnoDB Storage Engine: With the setting lower_c...