Re: Enabling and Disabling Sequencial Scan

On Fri, 30 May 2003, Robert Creager wrote:

> On Fri, 30 May 2003 14:46:12 -0600 (MDT)
> "scott.marlowe" <scott(dot)marlowe(at)ihs(dot)com> said something like:
>
> >
> > level cache is. On my machine it's about 800 meg. It's measured in 8k
> > blocks, so 100,000 * 8k ~ 800 meg. The smaller this is, the more
>
> My 'Cached' usage is 1.7Gb. I've hit the kernel mailing list, and the
> one response I got said don't worry about it :-(

Oh, yeah, just a bit on that. as far as the kernel developers are
concerned, the buffer / cache is working perfectly, and they're right, it
is. What they probably don't understand if your need to tell postgresql
how much cache/buffer is allocated to it.

so don't worry about the kernel, the linux kernel really is pretty good at
caching disk access.