On Mon, Jan 24, 2011 at 6:43 PM, Gavin Towey <gto...@ffn.com> wrote: > If you show the EXPLAIN SELECT .. output, and the table structure, someone > will be able to give a more definite answer. > > Thanks for the reply Gavin. I actually did place this info in my very first message on this thread, along with my basic table structure and server version. Myself and others have just stopped keeping the full, deeply-nested, quoted thread inside all subsequent messages which is why you probably haven't seen it.
However, here is the EXPLAIN SELECT from the first message (reformatted for email): select_type: SIMPLE table: recipients type: ref possible_keys: messages_fk, employee_idx key: employee_idx key_len: 5 ref: const rows: 222640 Extra: Using where; Using temporary; Using filesort select_type: SIMPLE table: messages type: eq_ref possible_keys: PRIMARY key: PRIMARY key_len: 4 ref: email_archive.recipients.message_id rows: 1 Extra: Anyhow, having now copied these tables to another server (MySQL 5.1) and done some tests (bumping up innodb_buffer_pool_size and playing with innodb_flush_log_at_trx_commit for my writes and a few other knobs) it is simply that these somewhat large tables need lots of RAM to perform well, just as Reindl Harald originally pointed out. Thanks again for the help everyone! -- Kendall Gifford zettab...@gmail.com
