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
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