Hello! I'm looking for opionions or advice about configuration options and table type choices. We're into performance, we want to have the maximum possible querys per/second, or as low resource usage as possible, for the choosen codebase/system (linux+apache+php4+mysql).
Our primary (sql) server is a AMD 1.4GHz, 1.5GB RAM, 18GB SCSI. Also a secondary server used for internal calculations. (crontab etc) which replicates from the primary server. Our application is "Community style" (messages, guestbooks, messageboards..) where every .php-request generates at least one connection and one or more selects, and possibly one or two inserts depending on the users action(s). We have two load balanced webservers connecting to the primary sql server. On these we have about 1000 simultaneus users on the site, which gives about 150 Queries per second avg. at peak times. We have heavy congestion on one table, the one with all user accounts in. This gives a lot of processes waiting for the table locks, and if we set a low max_connections this will generate errors. with a large max_connections there will be like 300 threads waiting for the same table once in a while. We have tried running with InnoDB in this table, but this only creates new problems, as we have indexed TEXT columns, for example with the usernames in. We end up having a huge load average and 250 threads in "sending data" state. What choice do we have exept a full code-rewrite and a redesign of the entire database ? We need no transactions, or any data integrity at all. We can afford to loose some data in trade for performance. (like a few hours or something, which seems like a lot even if the replication whould fail). Regards Johan --------------------------------------------------------------------- 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
