Over the weekend I upgrade my Ubuntu server from 9.10 to 10.04 which also updated my MySQL server. I also enabled MySQL replication over to another server as slave.
I have not yet moved any application logic to use slave but I started seeing some performance issues on my master MySQL server. The app has started slowing down and the number of slow queries have increased. Any good tool which can give me more information as to what might be going on or any tips to optimize this.