This is related to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1008400
The outcome of bug 1008400 is (I think) 'this is fixed on Quantal by changing the default IO scheduler to Deadline'. Two problems with that: 1. We see the same problem (but to a lesser extent) on the deadline scheduler. It thus can't be just a scheduler issue. 2. Precise is the LTS release - hence we need to use Precise. We are going to try the Quantal kernel with a deadline scheduler to see if it's any better. I have asked our QA team to produce a script that regularly times MySQL updates to make testing this easier. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1064521 Title: Kernel I/O scheduling writes starving reads, local DoS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1064521/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
