Chris,
> I have a RHEL 2.1 box running with dual Xeon (2.6 GHz I believe and
> they have HT on). The box has 8GB memory. In my postgresql.conf, I
> have set the effective_cache_size = 530505 (~4GB).
>
> However, I am noticing on this machine, top is telling me that I have
> ~3.5GB in the buff and only 3GB in cached.
effective_cache_size is just information for the query planner; it does not
affect the actually system file cache.
--
--Josh
Josh Berkus
Aglio Database Solutions
San Francisco