Re: Figuring out shared buffer pressure

On Wed, May 30, 2012 at 9:56 AM, Bruce Momjian <bruce@momjian.us> wrote:
> As part of a blog, I started looking at how a user could measure the
> pressure on shared buffers, e.g. how much are they being used, recycled,
> etc.
>
> They way you normally do it on older operating systems is to see how
> many buffers on the free list (about to be reused) are reclaimed as
> needed --- that usually indicates kernel cache pressure.  Unfortunately,
> we don't have a freelist, except for initial assignment of shared
> buffers on startup.

Isn't that what the buffers_alloc from pg_stat_bgwriter is ?

Cheers,

Jeff