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loadavg
2007 Sep 13
3
3Ware 9550SX and latency/system responsiveness
...re sluggish than I'd expect with a
comparatively powerful machine and hardware RAID 1.
I tried a few simple benchmarks (bonnie++, iozone, dd) and noticed up
to 8 pdflush commands hanging about in uninterruptible sleep when
writing to disk, along with kjournald and kswapd from time to time.
Loadave during writing climbed considerably (up to >12) with 'ls'
taking up to 30 seconds to give any output. I've tried CentOS 4.4,
4.5, RHEL AS 4 update 5 (just in case) and openSUSE 10.2 and they all
show the same symptoms.
Googling around makes me think that this may be related to q...