Re: Warm-up cache may have its virtue

On Sat, Jan 14, 2006 at 04:13:56PM -0500, Qingqing Zhou wrote:
>
> "Qingqing Zhou" <zhouqq(at)cs(dot)toronto(dot)edu> 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 jnasby(at)pervasive(dot)com
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