AIO queue count and disk response time

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AIO queue count and disk response time

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June 1st, 2012, 05:22

einthusan

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AIO queue count and disk response time

vfs.aio.num_queue_count is very high, at 128. However, ms/r is very low, less than 5ms. gstat shows the disk being 90-100% busy. I think something is wrong because usually the disk shows 100% busy when ms/r is about 30ms. Anyone have a clue what might be wrong? I set vfs.zfs.vdev.max_pending=2 from the default value 10.

Last edited by einthusan; June 1st, 2012 at 05:40.

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aio, vdev, zfs

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