Messages in this thread | | | Date | Fri, 22 Oct 2004 16:54:56 +1000 | From | Nick Piggin <> | Subject | Re: IO performance problems with 2.6.9 |
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Peter Zaitsev wrote:
> 4) Unrelated but still unfortunate. 2.6.9 kernel seems to behave weird > if swap is disabled. I was running with 8G of memory allocating 6G for > MySQL buffers which left about 1.5G for kernel, 1G of which was used > for file cache. During IO intensive run, using buffered IO I got > "kswapd" running like a crazy taking 90% of CPU time on one of CPUs. > What for is it running if there is no swap files enabled ? >
Can you boot with profile=2, and get a profile of about 30 seconds while kswapd is going crazy please?
Also capture /proc/vmstat before and after that interaval.
Can you also capture a the output of vmstat 1 while this is happening
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