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

[Con Kolivas]

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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