> What does "OO" mean in the `xentop --vbds` output?
I believe it refers to the number of times that VBD has encountered an "out
of
requests" error which has resulted in IO requests for that VBD being
delayed.
The pending request structures are a global resource, so I''d say
it''s likely
if you see these going up for one VBD they''ll also go up for others.
I guess it''s likely to be caused by some combination of (relatively)
slow disk
IO from dom0 and large numbers of requests coming from the VBDs of your
domains.
Cheers,
Mark
--
Dave: Just a question. What use is a unicyle with no seat? And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!
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