Re: Solaris Priority Paging and Database products.

In article <37D77F35.6D53E6A3_at_open.ac.uk>,   Richard Yates <r.j.yates_at_open.ac.uk> wrote:
> A quick question - has anyone implemented priority paging on Solaris
> and noticed a performance change with their database product? If so,
> I shall be very interested to hear any conclusions reached! I have
> done some testing, but due to certain factors formed no firm ideas,
> other than "it *should* be a good thing".

I haven't personally turned it on in anything. My feeling is that it shouldn't make any difference. If it does make any difference at all, it will be at really low memory situations, where your pagescan rate is approaching 100 pages/sec. (You can see your pagescan rate through sar - g or vmstat.)

But when you think about it, Solaris's existing default paging algorithm should be more than adequate at keeping pages in memory that it really needs and discarding pages that it doesn't. I was actually a little surprised to see Solaris advertised with this new paging scheme when it seemed to me that the existing scheme was already quite adequate. But you know the old marketing trick for cars, if there isn't at least a new grill changed from the previous year, you won't make a sale.

      Yousuf Khan

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Share what you know. Learn what you don't. Received on Thu Sep 09 1999 - 00:00:00 CEST