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bkirkbri
Joined: 09 Oct 2005
Posts: 13
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| Posted: Sun Mar 05, 2006 4:22 pm Post subject: Terrible performance on host49? |
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Anyone else on host49 noticing incredibly slow disk performance? I'm not swapping, not even close to it. Plenty of IOtokens in /proc/io_status too. But any access of the filesystem (vi, ls, running a perl script) takes up to several seconds to complete. I ran hdparm -t and it was < 2MB/s, not great but not too terrible either. Munin graphs show that all the CPU time I'm using is for IOwait.
I don't think that there's much I can do to avoid this. Can the offending node be found and corrected?
Dreaming of Xenode...
- Brian |
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ywliu
Joined: 08 Apr 2005
Posts: 19
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| Posted: Sun Mar 05, 2006 10:54 pm Post subject: |
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Mine is on host49 too. My (false) impression is it became noticeably slow during the past few weeks. My loading is always 0.1 or something. So my guess is someone on the host is thrashing the disk....
ywliu |
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bkirkbri
Joined: 09 Oct 2005
Posts: 13
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| Posted: Sun Mar 05, 2006 11:13 pm Post subject: |
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I think it has been slow for at least a week or two, but it seems to be getting more noticeable now. At least to me and I watch my server stats pretty closely.
Guess there's nothing to do but wait for Xen... |
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caker
Joined: 15 Apr 2003
Posts: 2371
Location: Galloway, NJ
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| Posted: Sun Mar 05, 2006 11:14 pm Post subject: |
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I found one node slightly thrashing. Let me know if that improves things.
-Chris |
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