Re: Pinning a table into memory

Tom Lane wrote:
>
> "David Blood" <david(at)matraex(dot)com> writes:
> > In Oracle you can Pin large objects into memory to prevent frequent
> > reloads. Is there anyway to do this with Postgres?
>
> I can never understand why people think this would be a good idea.
> If you're hitting a table frequently, it will stay in memory anyway
> (either in Postgres shared buffers or kernel disk cache). If you're
> not hitting it frequently enough to keep it swapped in, then whatever
> is getting swapped in instead is probably a better candidate to be
> occupying the space.

As I understand it, he's looking for a mechanism to prevent a single
sequential scan on a table, larger than the buffer cache, to kick out
everything else at once. But I agree with you that pinning other objects
is just mucking with the symptoms instead of curing the desease.

Jan

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