On Wed, Jan 5, 2022 at 07:27:55PM +0100, Mathias Kunter wrote:
> Am 28.12.21 um 17:03 schrieb Tom Lane:
> > Mathias Kunter <mathiaskunter@gmail.com> writes:
> > > Consider the situation
> > > where the randomly fetched pages are mostly (or even entirely) cached in
> > > RAM, but where the sequentially fetched pages must be mostly read from
> > > disk. An example for such a scenario is a database system which uses
> > > RAM-cached indices.
> >
> > I think fooling with effective_cache_size is a better way to model
> > that situation.
>
> The default value of effective_cache_size is 4 GB. Which value should be
> used instead on a system which only has 4 GB of total RAM, but still uses
> RAM-cached indices?
This might help:
https://momjian.us/main/blogs/pgblog/2012.html#May_4_2012
--
Bruce Momjian <bruce@momjian.us> https://momjian.us
EDB https://enterprisedb.com
If only the physical world exists, free will is an illusion.