For me it would look right to make vnode pages that are not mapped by any
process inactive.
This would allow the fs cache to grow to approx 1/3 of main mem and it
would be able to use even more memory if it is free.
Merging the two inactive queues improves the paging behaviour, I have
treied that anon and vnode pages get paged much more smoothly....

lars

Frank van der Linden wrote:

> The UBC + interactive performance thing came up again in some internal
> discussion recently, but this is a better place for it.
>
> First of all, there still seem to be some complains about bad
> interactive performance (i.e. program ("text") pages being
> paged out because they're being claimed for data).
>
> I noticed that the default value for 'vtextmin', the minimum threshold
> for the percentage of pages dedicated to text, is currently 5%. Which
> is a bit low, even at 512M this would only get you 25M, which is
> easily exceeded by just running X and netscape or mozilla. People
> who are seeing problems might want to try setting this at a higher
> value of, say, 20%.
>
> Maybe another simple thing to try is 'don't touch text pages, unless
> the data pages fall below a certain threshold'. This would
> be easy to do (it's all in lines 451-478 in uvm_pdaemon.c).
>
> Lastly, I believe that another problem was that shared libraries
> are treated the same as 'normal' data files. Not sure what to
> do there, maybe a heuristic that prefers keeps r-x mapped pages?
>
> - Frank
>
> --
> Frank van der Linden                           fvdl@wasabisystems.com
> ======================================================================
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