>In the MySQL manual it says that MySQL performs best with Linux 2.4 with
>ReiserFS on x86. Can anyone official, or in the know, give similar
>information regarding PostgreSQL?
>
>
I'm neither official, nor in the know, but I do have a spare moment! I
can tell you that any *NIX variant on any modern hardware platform will
give you good performance, except for Cygwin/x86. Any differences
between OSes on the same hardware are completely swamped by far more
direct concerns like IO systems, database design, OS tuning etc. Pick
the OS you're most familiar with is usually a good recommendation (and
not just for Postgres).
