On 2015-04-23 4:07 PM, Ulrich Windl wrote:
>>>> Geoff Swan <[email protected]> schrieb am 22.04.2015 um 23:18 in
>>>> Nachricht
> <[email protected]>:
>
> [...]
>> Free stats look fine to me. No swap is being used, or has been used yet
>> on this system.
>>
>> total used free shared buffers cached
>> Mem: 132005400 21928192 110077208 10612 363064 19230072
>> -/+ buffers/cache: 2335056 129670344
>> Swap: 8388604 0 8388604
>>
>> The effect I am seeing is that despite a reasonably fast disc system,
>> the kernel writing of dirty pages is painfully slow.
> So disk I/O stats is also available via sar. May we see them? Finally there's
> blktrace where you can follow the timing and positions of each individual
> block being written, but that's not quite easy to run and analyze (unless I
> missed the easy way).
>
> I suspect scattered writes that bring your I/O rate down.
>
> Regards,
> Ulrich
>
sysstat (and sar) is not installed on this system, so I can't give you
that output.
