This version continues to improve the InnoDB Storage engine, mainly including:
- The InnoDB Storage engine is upgraded to version 1.1.1, which is also the latest development version.
- InnoDB uses a hash table to store redo logs during restoration. In 64-bit systems, the hash table size is 1/8 of the buffer pool size. To reduce memory usage, the size of the buffer pool for the hash table is adjusted to 1/64. If it is a 32-bit system, it is 1/128.
- In the slow query log, the Rows_examined values of the UPDATE and DELETE statements are no longer displayed as 0
- Remove the mysql_fix_privilege_tables script
- Add the new variable skip_name_resolve to Disable Machine name resolution for client connections.
- Added the SHA2 () function.
- All numeric-based functions will now throw a value out-of-bounds error.
- Other bugs have been fixed.
For details, see Change History.
Http://dev.mysql.com/doc/refman/5.5/en/news-5-5-5.html
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