If you only use heap tables, you are just putting your messages into RAM, the are never written to the hard drive! Are you keeping a copy of the messages elsewhere just in case the machine or database dies/restarts? In addition, heap tables prior to MySQL 4.1 have indexing deficiencies, which can make them slower in certain situations.

Jan Pavlík wrote:

Hi,
last week I had problem with imap and pop3 servers -> my solution was upgrade to mysql 4.0.12 - without innodb, without isam, myisam and heap only... try it, if someone with the same problem. Bye


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