load the whole database into RAM

On 27 Mar 2007 23:43:38 -0700, filippo <filippo2991@virgilio.it> wrote:

I use pgsql to store data for my program (hotel manager). The
filesystem reports that the size on disk of database is not so bing
(~100MB ~20MB actual data). I want to tune the engine to fit the
database as much as possible in RAM, say: postgres, please, use 512MB
(1GB) of my RAM just for your needs and load everithing on it. Is
it possible and, of course, effective?

Just taking a look to some tuning document I didn't find a direct
answer (I'm not a smart guy)

All modern operating systems do this without any extra effort on your
part...all you can really do is get in the way.

Just make sure there is enough ram in the box and let postgresql do
its thing. I think in your case the only thing you should be
considering is to turn fsync on (safe, slow, default) or off (unsafe,
fast).

merlin

On Tue, Mar 27, 2007 at 11:43:38PM -0700, filippo wrote:

I use pgsql to store data for my program (hotel manager). The
filesystem reports that the size on disk of database is not so bing
(~100MB ~20MB actual data). I want to tune the engine to fit the
database as much as possible in RAM, say: postgres, please, use 512MB
(1GB) of my RAM just for your needs and load everithing on it. Is
it possible and, of course, effective?

Just put lots of RAM in the machine and let the OS cache it all. The
only knob you'd really need to tune would be random_page_cost, which
you could set at one (though perhaps effective_cache_size will handle
that for you...

Have a nice day,
--
Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/