In article <1096261381.25688.741.camel@localhost.localdomain>,
Neil Conway <neilc@samurai.com> writes:
> I think the conclusion of past discussions about this feature is that
> it's a bad idea. Last I checked, MySQL has to clear the *entire* query
> cache when a single DML statement modifying the table in question is
> issued.
Nope, it deletes only queries using that table.
> Not to mention that the feature is broken for non-deterministic
> queries (like now(), ORDER BY random(), or nextval('some_seq'), and so
> on).
Queries containing now(), rand(), or similar functions aren't cached by MySQL.