Re: Quad Xeon vs. Dual Itanium

No disagreement from me about the 64-bit *hardware* and *os*...

Now suppose you want to run a Pg database for such a situation.... may
as well compile 32-bit.

Why ? well you *dont* want to set shared_buffers to 20G... in fact 200M
works better -
why ? well your 64-bit os file cache is much more efficient at using
your 24G or RAM than Pg's buffer cache logic is (at the moment anyway).

regards

Mark

Dann Corbit wrote:

>
>Where 64 bits matters (in general -- not restricted to PG database
>systems):
>
>Size of the database is huge (e.g. every toll paid in New Jersey in the
>last 5 years)
>Available memory is huge (e.g. you buy a machine with 24 gigs of ram)
>Data bus bandwidth is huge (e.g. You buy an 8-way Opteron with 40 GB/sec
>bandwidth)
>
>The 32 bit machines cannot compete in these arenas.
>
>
>
>