> Quite, but in the meantime, a good benchmark should stress the system
> enough to cause crashes, lockups or at least incorrect results if a
> bug is introduced in the shared memory or semaphore code, and will
> definitely reveal any slowdowns introduced by new code, so my question
> is: where can I find a good benchmark for PostgreSQL? Note that I
> don't care about comparing PostgreSQL to other RDBMSes; I just want to
> a) test PostgreSQL under high concurrent load and b) if possible,
> measure the performance impact of a patch.
You can use contrib/pgbench as a rather simplistic test, or you could
try OSDB (http://osdb.sourceforge.net/)
Chris