On Thursday 27 February 2003 05:41, Liz Derr wrote: > I'm using MySQL 3.23.49-log on Debian Linux 2.4.18-bf2.4. > I am using replication over ssh tunnels, and one of the slaves is > apparently in need of performance tuning. > > After reviewing the status and variable settings (detailed below) and the > MySQL online manual, I decided that I needed to up the key_buffer_size. > Unfortunately, I've not been successful in doing this. > > I tried setting it at the command line: > mysql> set key_buffer_size=32M; > ERROR 1064: You have an error in your SQL syntax near 'key_buffer_size=32M' > at line 1
You can't set up this variable via command-line client. > I tried setting it in /etc/mysql/my.cnf (detailed below), restarted mysqld, > and did a show variables, and it was still 16M. > > I thought maybe this is variable that is dependent upon the master db. > So I changed the master /etc/mysql/my.cnf to set the key_buffer_size to > 32M, and restarted it. I did a show variables on the master, and indeed > it now has a key_buffer_size of 32M. > > I went back to the slave and restarted it, but it *STILL* has a > key_buffer_size of 16M (and it still has the 32M setting in the my.cnf). > > So, does anyone have any suggestions? Of course, this is predicated on > my possibly naive idea that changing the key_buffer_size will help. If > anyone else has suggestions on other tuning, those would be much > appreciated, too. Has anyone done much performance tuning on > replicated databases? I imagine that there might be some differences > between that and non-replicated db tuning. > my.cnf must be located in the /etc dir instead of /etc/mysql. -- For technical support contracts, goto https://order.mysql.com/?ref=ensita This email is sponsored by Ensita.net http://www.ensita.net/ __ ___ ___ ____ __ / |/ /_ __/ __/ __ \/ / Egor Egorov / /|_/ / // /\ \/ /_/ / /__ [EMAIL PROTECTED] /_/ /_/\_, /___/\___\_\___/ MySQL AB / Ensita.net <___/ www.mysql.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
