On Tue, Aug 28, 2001 at 12:50:15AM +1000, Andrew Snow wrote:
> Yeah, fair enough. But mmap works well on the more popular platforms
> used for PostgreSQL. And it can't *hurt* performance, and its probably
Actually, it CAN hurt performance, even on some of the more popular
platforms.
> worth doing simply so that PostgreSQL "plays nicely" with other
> applications using the VM resources on a particular system, instead of
> the "fixed size buffer cache" approach.
Using mmap() vs a fixed buffer doesn't really make much difference. The
access patterns are going to be pretty similar in both cases and the level
of paging would be about the same.
mrc
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