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.
Jan
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