Some quick Opteron 32-bit/64-bit results

[William Yu <wyu@xxxxxxxxxxx>]

I just finished upgrading the OS on our Opteron 148 from Redhat9 to 
Fedora FC2 X86_64 with full recompiles of Postgres/Apache/Perl/Samba/etc.

The verdict: a definite performance improvement. I tested just a few CPU 
intensive queries and many of them are a good 30%-50% faster. 
Transactional/batch jobs involving client machines (i.e. include fixed 
client/networking/odbc overhead) seem to be about 10%-20% faster 
although I will need run more data through the system to get a better 
feel of the numbers.