On Sat, Jan 14, 2006 at 04:13:56PM -0500, Qingqing Zhou wrote: > > "Qingqing Zhou" <[EMAIL PROTECTED]> wrote > > > > I wonder if we should really implement file-system-cache-warmup strategy > > which we have discussed before. There are two natural good places to do > > this: > > > > (1) sequentail scan > > (2) bitmap index scan > > > > For the sake of memory, there is a third place a warm-up cache or pre-read > is beneficial (OS won't help us): > (3) xlog recovery
Wouldn't it be better to improve pre-reading data instead, ie, making sure things like seqscan and bitmap scan always keep the IO system busy? -- Jim C. Nasby, Sr. Engineering Consultant [EMAIL PROTECTED] Pervasive Software http://pervasive.com work: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461 ---------------------------(end of broadcast)--------------------------- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq
