Hello, I've got this question about query cache in mysql 4 - when I do query like this:
SELECT SQL_CACHE column_a FROM table_a WHERE column_a = 'const'; and then I update table like this: UPDATE table_a SET column_b = column_b + 1; cache entry is invalidated and deleted (I hope, I understood mysql sources correctly - I made just a quick look into query_cache.cc). Mechanism for cleaning cache entries deletes them always, when any table from cached query is modified. I think, it would be better to clean it only, when relevant columns (those, used in the query) are changed (+ in case of any delete/insert of course). Or would it be too slow to to check? -- S pozdravem Marek Janda email: [EMAIL PROTECTED] www: http://www.nyx.cz/home/ OpenPGP: http://www.nyx.cz/nyx/gpg-key/nyx.gpg --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
