Hi Stefan, Yes, the same instance that froze (collected it after a reboot).
- looking at the same instance type, does it happen on all of them sooner or later or are there exceptions? There is one of our instances of that type that is under the same load but hasn't frozen in weeks. Since they're part of the same sharded cluster, they receive a very similar amount of queries. Not sure why that one is different. We've rolled out about 20 instances of this type, and other than that one, they all freeze. Things that we've tried: LVM vs MDADM (still freezes), XFS vs ext4, not raiding the ephemeral storage at all, all of them led to freezes. The one that has only frozen once is non-RAIDed and uses XFS, but that same combination led to freezes in other instances. - did the same kind of workload run without issues in a previous Ubuntu release or were those new projects starting with Onerirc/Precise We usually run Natty, we only upgraded to Precise to see if it would fix the issue (it actually happens much more quickly on Precise). We did similar workloads at smaller rates on Natty, but with the SSD instances we're throwing 3x the traffic to each instance. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1011792 Title: Kernel lockup running 3.0.0 and 3.2.0 on multiple EC2 instance types To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1011792/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
