Re: [PERFORM] Proposal of tunable fix for scalability of 8.4

2009-03-21 Thread Jignesh K. Shah
Robert Haas wrote: On Fri, Mar 20, 2009 at 7:39 PM, Jignesh K. Shah wrote: Alvaro Herrera wrote: So Simon's correct. And perhaps this explains why Jignesh is measuring an improvement on his benchmark. Perhaps an useful experiment would be to turn this behavior off and comp

Re: [PERFORM] Proposal of tunable fix for scalability of 8.4

2009-03-21 Thread Simon Riggs
On Fri, 2009-03-20 at 15:28 +, Matthew Wakeling wrote: > On Thu, 19 Mar 2009, Scott Carey wrote: > > In type B, the ratio of requests that must context switch is always == > > 1. Every request must queue and wait! > > A remarkably good point, although not completely correct. Every request