Russell - do you remember what version of PostgreSQL you were using?
There were shared memory errors across many platforms.
http://archives.postgresql.org/pgsql-general/1998-08/msg00183.php Many of these bugs have been fixed in the later versions.
I do think that cygipc (http://www.neuro.gatech.edu/users/cwilson/cygutils/index.html) is the weakest link in the chain right now. It will get rolled into the forthcoming "Cygwin Daemon" but is currently deprecated by the author.
If you end up doing any benchmarking, I would love to see the results! My PostgreSQL 7.1.3/Cygwin OpenACS site is not experiencing 8 inserts/second, but it would be great if it could. 😊
