Re: performance problem

"Rick Gigger" <rick@alpinenetworking.com> writes:

> > That's VERY high.  When postgresql has to manage a lot of buffers it
> > actually is slower than letting the kernel in Linux or BSD do it for you.
>
> Even if you've got the memory to spare?  Does postgres actually slow down
> just because it's slower to manager a lot of them just or because you're
> taking the memory away from the kernel so the kernel has to swap more?

The latter, mainly, I think.  Also you *really* don't want your kernel
to swap out any of your shared buffers, which can happen if they take
up a significant portion of RAM...

-Doug