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SubjectRe: VM behaviour under 2.4.5-ac21


On Sat, 30 Jun 2001, J . A . Magallon wrote:

>
> On 20010629 Martin Knoblauch wrote:
> >Hi,
> >
> > just something positive for the weekend. With 2.4.5-ac21, the behaviour
> >on my laptop (128MB plus twice the sapw) seems a bit more sane. When I
> >start new large applications now, the "used" portion of VM actually
> >pushes against the cache instead of forcing stuff into swap. It is still
> >using swap, but the effects on interactivity are much lighter.
> >
>
> I was just going to say the same. After ac20, I think, the kernel stopped
> pre-allocating swap.
> Before I had always some swap used even if I was only using half my core memory
> (256Mb). And growing. I have not seen the box touch the swap since ac20.
> It uses all the ram it can get for cache, but does not send anything to swap
> to use its ram for cache.
> Now running ac21 while building ac22, and state is:
> werewolf:/usr/src# free
> total used free shared buffers cached
> Mem: 255588 241044 14544 2168 8836 153752
> -/+ buffers/cache: 78456 177132
> Swap: 152576 0 152576
> werewolf:/usr/src# vmstat
> procs memory swap io system cpu
> r b w swpd free buff cache si so bi bo in cs us sy id
> 1 0 0 0 6944 8836 153868 0 0 16 12 95 385 17 3 80
>

Weird: there is no VM change between ac20 and 21.

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