Re: Slow on heavy I/O operations.
- From: Cheffo <cheffo@xxxxxxxxxxxxxx>
- Date: Thu, 22 Mar 2007 15:43:47 +0200
Roman Gorohov. wrote:
-CUT-
That seems like true, and I forget to mention that 2/3 of swap is
located at physical disk(da0).
[idle@hst ~]#swapinfo
Device 1K-blocks Used Avail Capacity Type
/dev/da0s1b 524160 463300 60860 88% Interleaved
/dev/rvn0b 1048448 578724 469724 55% Interleaved
Total 1572608 1042024 530584 66%
But what I can't understand - why such non-critical(as it seems to me) disk activity,
cause 100% busyness for disk? Its claim to be 40.000MB/s transfers, but
sometimes its 100% busy when iostat show only 1 MB/s.
Regards, Roman.
Imagine 1000 request per second and every request is 1KB,
and compare it with a single request that is 1MB.
In first variant your disk will be 100% busy and in the second 2-3%.
I think you can guess why ?
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--
Best Wishes,
Stefan Lambrev
ICQ# 24134177
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