MySQL 5.5.19 release attachment download

MySQL 5.5.19 is released.

Improvements to this version include:

New Feature

◆ By creating a cache for the metadata lock object, the performance of the metadata Lock operation in Windows XP is improved, which allows the server to avoid high-cost operations for creating and destroying the synchronization object in XP.

◆ A new system variable metadata_locks_cache_size is added, allowing you to control the cache size. The default size is 1024.

◆ Copy: before that, the master/slave server uses a non-local authenticated master account to copy the connection. It is also applicable to Windows Local authentication.

Bug fixes

◆ InnoDB Storage engine: When the buffer for DML operations is greatly changed, especially when the DELETE statement is used, server deadlocks may occur.

◆ DBL_MAX returns DBL_MAX instead of "inf ".

◆ When the -- write-binlog or -- skip-write-binlog option is used for running, mysql_upgrade does not upgrade the system table or create the mysql_upgrade_info file.

◆ If a plug-in is uninstalled, local variables of the string type variables marked with PLUGIN_VAR_MEMALLOC are not released.

For more information, see: http://dev.mysql.com/doc/refman/5.5/en/news-5-5-19.html

: Http://www.mysql.com/downloads/mysql/