with my application, it seems that size of cache has great effect: from 512 Kb of L2 cache to 1Mb boost performance with a factor 3 and 20% again from 1Mb L2 cache to 2Mb L2 cache. I don't understand why a 512Kb cache L2 is too small to fit the data's does it exist a tool to trace processor activity and confirm that processor is waiting for memory ? does it exist a tool to snapshot postgres activity and understand where we spend time and potentialy avoid the bottleneck ?
thanks for your tips. -- Jean-Max Reymond CKR Solutions Open Source Nice France http://www.ckr-solutions.com ---------------------------(end of broadcast)--------------------------- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq
