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. We get a mysterious MySQL lockup once a week at the same day & time. Questions : - Is our configuration of 2 sets of 8 Apache/PHP web servers & 1 MySQL servers just not a good idea ? - Would we better off with FreeBSD ? - Is there anyone doing any similar setups with lots of web servers & a few MySQLs ? - Is there any way to get Apache / PHP to use fewer connections ? We pay for MySQL support but haven't had much help from them. - Sam. --------------------------------------------------------------------- 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
