Jan Wieck wrote:
> Tom Lane wrote:
>
> > Jan Wieck <JanWieck@Yahoo.com> writes:
> >> Okay, my proposal would be to have a VACUUM mode where it tells the
> >> buffer manager to only return a page if it is already in memory, and
> >> some "not cached" if it would have to read it from disk, and simply skip
> >> the page in that case.
> >
> > Since no such call is available at the OS level, this would only work
> > well with very large shared_buffers settings (ie, you try to rely on
> > PG shared buffers to the exclusion of kernel disk cache). AFAIK the
> > general consensus is that that's not a good way to run Postgres.
>
> Oh-kay ... so yes Manfred, your RSM is probably the better way.
Added to TODO.
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Bruce Momjian | http://candle.pha.pa.us
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