On Wed, Mar 06, 2002 at 11:06:18AM -0800, Sam Iam wrote: > > We have a very high volume site (3 million page views a day) that's > run on 16 Apache / PHP web servers & 2 MySQL servers. We are using > PHP with persistent connections. Each MySQL serves 8 web servers & > is supposed to act as a failover machine for the other group of 8 > web servers. > > The failover won't work now as if one MySQL goes down the cost of > the 8 web servers switching over is so high the other MySQL locks > up. > > Each Apache / PHP server takes up hundreds of connections even when > they're idle so we ran into the Linux connection limit of 1000 & had > to recompile to get past that. > > Our actual MySQL CPU useage is low but the goes when with the connection > overhead when starting up or failing over a bank of machines.
Are the Web servers doing write operations on the database, or read-only? If they're read-only, pick up a cheap load-balancer (a 3 year old Alteon will work fine) and load-balance across the 2 MySQL servers. Then you'll get the best utilization. Others have addressed the other issues you raised, it seems... Jeremy -- Jeremy D. Zawodny, <[EMAIL PROTECTED]> Technical Yahoo - Yahoo Finance Desk: (408) 349-7878 Fax: (408) 349-5454 Cell: (408) 685-5936 MySQL 3.23.47-max: up 27 days, processed 979,505,907 queries (408/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
