I came across the following configuration today on a Production MySQL system (5.0.67) running 30+ blogs using WordPress MU .
$ cat /etc/my.cnf [mysqld] set-variable = max_connections=500 safe-show-database
No I did not truncate the output. I could say I’ve seen worse, but that’s a stretch.
![](http://media.wiley.com/product_data/coverImage300/12/04704169/0470416912.jpg)
For example, I’ll give you the most obvious.
key_buffer_size = ????
To determine a key_buffer_size to start with I would look at the size of all Indexes via I_S, and combine with some estimate of growth, say 2x-5x.
For the best answer with the top 5 settings, I’ll send you a copy of Sheeri Cabral’s book MySQL Administrators Bible which even I as a resident MySQL Expert has enjoyed scanning and learning something new.