Added --sql-mode=value[,value[,value]] option to mysqld. See Section 5.2.1, “Command Options”.

Fixed possible problem with shutdown on Solaris where the .pid file wasn't deleted.

InnoDB now supports < 4GB rows. The former limit was 8000 bytes.

The doublewrite file flush method is used in InnoDB. It reduces the need for Unix fsync() calls to a fraction and improves performance on most Unix flavors.

You can now use the InnoDB Monitor to print a lot of InnoDB state information, including locks, to the standard output. This is useful in performance tuning.

Several bugs which could cause hangs in InnoDB have been fixed.

Split record_buffer to record_buffer and record_rnd_buffer. To make things compatible to previous MySQL versions, if record_rnd_buffer is not set, then it takes the value of record_buffer.

Fixed optimizing bug in ORDER BY where some ORDER BY parts where wrongly removed.

Fixed overflow bug with ALTER TABLE and MERGE tables.

Added prototypes for my_thread_init() and my_thread_end() to mysql_com.h

Added --safe-user-create option to mysqld.

Fixed bug in SELECT DISTINCT ... HAVING that caused error message Can't find record in #...