We run GCC-compiled postgresql on a number of HP-UX and Linux boxes. Our measurements to date show 8.3.1 performance to be about 30% *worse* than 8.2 on HP-UX for the same "drink the firehose" insert/update/delete benchmarks. Linux performance is fine. Tweaking the new 8.3.1 synchronous_commit and bg writer delays that *should* speed things up actually makes them a bit worse, again only on HP-UX PA-RISK 11.11 and 11.23. Right now it's 32 bit, both for 8.2 and 8.3. Any hints? P. J. Rovero
