Re: IBM AIX Kernel parameter limitations [HP issues]

Greg Moye wrote: >> >> Anybody out there have a similar in depth understanding of HP's shared >> memory segment limitations?? >> >> So far my understanding of HP shared memory is: >> >> "For any given instance of HP-UX on any PA-RISC machine, more than 2 >> shared memory segments systemwide will lead to excessive processor >> interrupts to properly load the registers that contain the last 2 >> shared >> segment addresses referenced, resulting in drastically reduced >> throughput." >> >> Can anyone verify or debunk my perception of this? I don't know about the theory, but I've tested the performance impact of having multiple Virtual segments as against a single large one of the same size - under 10.20, in my tests, the 'single large' was over twice as fast as the '5 small'. We are also finding KAIO slowing, yes slowing, us down significantly (takes 50 to 150% more time depending on the type of task). We're still investigating the cause. Rudy Fernandes Purolator Courier Rudy Fernandes Purolator Courier, Canada Off : rfernand@purolator.com Res : rferdy@pathway.com