1

The load has been sitting at around 6 but there is very little running on the box. Any ideas what's causing this? It's a large AWS instance.

CPU Load

procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 0  4      0 4815700 179440 548200    0    0     0     3    2    3  5  1 91  0
 0  4      0 4821256 179444 548192    0    0     0     0  228  373  1  1 48 48
 0  4      0 4821296 179444 548196    0    0     0     0   96  150  0  0 50 50
 0  4      0 4822832 179444 548200    0    0     0     0  158  197  1  1 49 49
 0  4      0 4823452 179444 548200    0    0     0     0   98  149  0  0 50 50
 0  4      0 4823452 179444 548200    0    0     0     0   94  149  0  0 50 50
1

As noted by James C, it looks like you are having trouble with disk IO, not CPU time. If your instance is in the us-east data center they are having trouble there today and latency to EBS volumes is way up.

0

The right most column in the vmstat output indicates that there's a lot of i/o wait going on. 50% of CPU time. Could you please post the output of iostat 10 6 as this should give us a good insight as to which disks are slowing stuff down.

I'm not sure what EBS performance is like but if you're doing a lot of I/O then it might be having problems keeping up.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.