On Fri, 07 Apr 2006 15:56:52 -0700 "Luke Lonergan" <llonergan@xxxxxxxxxxxxx> wrote: > Seems like you're hitting a very small target in RAM with these semop > calls. I wonder what part of the code is doing this - Tom would know > better how to trace it, but the equivalent of oprofile output would > be nice. I'm happy to test whatever I can, but I simply don't know enough AIX to be able to tell whether a similar kernel-level profiler is available/possible. > The other thing that I'd like to see is an evaluation of the memory > access latency of this machine from Register to RAM. I couldn't find > a benchmarking tool that was UNIX friendly out there, maybe I'll > write one real quick. I suspect this machine has a heinous latency > and a storm of semops to the same spot of RAM might be a far worse > performance problem on this machine than on others... Well, as I said to Tom, the machine is available for running tests on :) If it helps us, and helps pg become more AIX friendly, then I'm all for whatever needs done... Cheers, Gavin.
