Comment 21 for bug 1011792
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| Mike Krieger (mike-nw2wga2s5w6wnovqwws3u9) wrote | #21 |
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(Get the code!)
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.