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High I/O - Idle CPU

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kouchpotato

kouchpotato

Programmer
Nov 2, 2001
38
GB
ok a strange one for you all,

I have a v880 running Veritas volumes.
when I boot the server the system is fine and everything looks good.
As soon as any load goes onto u01 volume the i/o wait on the server goes through the roof and stays there.

mpstat shows cpus idle with 98% wait time.

vxstat shows

vol u01 107859 91339 4139708 7189962 5.1 58.6
vol u01-L01 22369 17430 825194 1384580 4.8 70.8
vol u01-L02 22337 13647 828136 1352462 4.7 73.6
vol u01-L03 22648 37661 832104 1739201 6.3 34.1
vol u01-L04 22443 13690 829678 1356405 4.8 79.2
vol u01-L05 22291 13780 824596 1357314 4.6 81.3

Any ideas people?

thx

K
 
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