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SubjectRe: graphical swap comparison of aa and rik vm
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On Thursday 01 November 2001 07:10, Rik van Riel wrote:
> On Thu, 1 Nov 2001, Mark Hahn wrote:
> > also, if you merely sum the SI and SO columns for each:
> > sum(SI) sum(SO) sum(SI+SO)
> > Rik-VM 43564 317448 290032
> > AA-VM 118284 171748 361012
> > to me, this looks like the same point: Rik being SO-happy,
> > Andrea having to SI a lot more. interesting also that Andrea wins the
> > race, in spite of poorer SO choices and more swap traffic overall.
>
> I think this is because in safemode's test, the swap space
> gets exhausted. My VM works better when there is lots of
> swap space available but degrades in the (rare) case where
> swap space is exhausted.
>
> Testing corner cases always gives interesting results ;)
>
> regards,
>
> Rik

In my previous post i mentioned something like that as to why your vm didn't
perform as well. The thing isn't that you use all of my available memory
(ram + swap), it's that you allocate it all, leaving nothing for the program
later on. I think anything that uses almost a gig of ram outside of
databases is going to be a corner case, but perhaps a better way to figure
out how much memory should be allocated is needed here. Andrea's vm seems
to do a good job at that. if only he could figure out a better way to swap
out pages correctly the first time (as some people say his made more mistakes
than yours) then i cant really find anything bad about it. And i'm trying
to.

Also as others pointed out. After the process was done. You had quite a lot
more swap still allocated. Why exacty?
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