On Fri, Jul 10, 2009 at 10:27 PM, <sriram.dandapani@bt.com> wrote: > > 2G per process is plenty ...and useful if you have large data warehouse style queries which are long running (especially multiple of those)
For you, yes. But not necessarily for others.
> We do benefit from the Linux memory caching model regardless of what Postgres uses right ?
Definitely.
> On a machine which we upgraded from 4G to 16G on a 32 bit PAE kernel...we saw a doubling of performance for most queries of a certain type.(mostly data warehouse type accessing several hundreds of thousands of records). > > Postgres version that we use is 8.1.9.
I bet you'd see another big performance improvement with a 64bit OS and pgsql AND an upgrade to 8.4. But if it's fast enough, then stick to 8.1.x I would recommend an update to the latest 8.1 release though.
