It doesn't look like you are using an index. Have you tried creating one and seeing what the effect on execution time is?
--Russell ----- Original Message ----- From: "Philip Brown" <[EMAIL PROTECTED]> To: "Russell Miller" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Friday, October 05, 2001 1:34 PM Subject: RE: Bizarre query performance > > Have you tried "explain"ing the two select to see where all the time is > > being spent and how the queries are optimized? > > Sorry, I should have included that in my detail. > > +-------+-------+---------------+---------+---------+-------+------+-------+ > | table | type | possible_keys | key | key_len | ref | rows | Extra | > +-------+-------+---------------+---------+---------+-------+------+-------+ > | X | const | PRIMARY,p1 | PRIMARY | 4 | const | 1 | | > +-------+-------+---------------+---------+---------+-------+------+-------+ > > This is the query that takes 200ms. It performs the same regardless of the > particular table involved (all have a similar primary key), or the record > fetched. > > +------+-------+----------------+----------------+---------+------+------+-- > ----------+ > | table| type | possible_keys | key | key_len | ref | rows | > Extra | > +------+-------+----------------+----------------+---------+------+------+-- > ----------+ > | X | range | ScheduledStart | ScheduledStart | 8 | NULL | 25 | > where used | > +------+-------+----------------+----------------+---------+------+------+-- > ----------+ > > This is the query that takes less than 10ms. Performance should be worse > than that > above, but it is not. _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com --------------------------------------------------------------------- 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
