From: [EMAIL PROTECTED] Date: Tue, 24 Sep 2002 13:41:23 +0800 (WST)
I've got a problem with HEAP tables (undoubtedly the way that I'm using them). I'm running MySQL v.3.23.51 under Debian Linux with a 2.4.17 kernel. .... If anyone can help clear some of the fog, I'd appreciate it !! I've just spent some time trying HEAP tables to see if they speed up my prime application. Surprisingly, they do not. While HEAP tables are in memory, the disk buffering for MyISAM tables in Linux 2.4 works so well that MyISAM consistantly was about 1.4 times faster. It may be an artifact of the table storage system here, I keep a big archive and pull blocks out. Those blocks are entered daily, so the archive tends to keep the block data together. Pulling out a block into a HEAP table isn't faster than reading the archive because the archive's block is in the linux disk buffer now. Pulling a block into a MyISAM table is faster that reading the archive. So if you've chosen HEAP tables because they might be faster, it may be worth it to check that belief. -- mysql, query --------------------------------------------------------------------- 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
