On Thu, Dec 06, 2001 at 09:39:18AM +1000, Arjen G. Lentz wrote: > Well, you have to realise that the server can only use a one index > per table (for obvious reasons).
That's far from being obvious to a lot of folks... > You can actually split a table into multiple identical ones, by > using MERGE tables (see manual). But that just makes managing them > easier (and inserts into one table faster), it wouldn't speed up > your SELECT. In fact, doing so introduces a bit more overhead. > > So i wonder if there's any way to optimise MySQL so that i will be > > able to actually do a SELECT on those tables. Maybe tweak > > parameters like join_buffer_size? table_cache? Anyone has some > > experience with these?... What's the best way to optimize MySQL > > for running SELECTs on multiple large tables? > > Yes, server settings are important, and the 'right' settings depend > on your system (amount of RAM, etc) as well as on your database and > the type of queries that you run most often. And pick up a copy of the December Linux Magazine. There's an article on MySQL Server Tuning in there. It'll be on the web in a couple months, too. > There is no magic wand, I'm afraid. But... you may find it > advantagious to do a MySQL training course > (www.mysql.com/training/). Optimisation is a very important part of > the course material, in this message I've just touched briefly on a > few little items. Good plan, too. :-) Jeremy -- Jeremy D. Zawodny, <[EMAIL PROTECTED]> Technical Yahoo - Yahoo Finance Desk: (408) 349-7878 Fax: (408) 349-5454 Cell: (408) 685-5936 MySQL 3.23.41-max: up 7 days, processed 157,486,781 queries (257/sec. avg) --------------------------------------------------------------------- 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
