Re: swapping and the value of /proc/sys/vm/swappiness

Con Kolivas
2004-09-07T10:57:56Z

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Nick Piggin wrote:
>
>
> Marcelo Tosatti wrote:
>
>>
>> Hi kernel fellows,
>>
>> I volunteer. I'll try something tomorrow to compare swappiness of
>> older kernels like 2.6.5 and 2.6.6, which were fine on SGI's Altix
>> tests, up to current newer kernels (on small memory boxes of course).
>>
>
> Hi Marcelo,
>
> Just a suggestion - I'd look at the thrashing control patch first.
> I bet that's the cause.

Good point!

I recall one of my users found his workload which often hit swap lightly
was swapping much heavier and his performance dropped dramatically until
I stopped including the swap thrash control patch. I informed Rik about
it some time back so I'm not sure if he addressed it in the meantime.

Cheers,
Con

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