Re: A multi CUP performance problem

Centuries ago, Nostradamus foresaw when liyuexin@neusoft.com (Li YueXin) would write:
> I found postgresql running on the multi CPU machine doesn't have
> better performance than single CPU machine. Can you explain the
> reason? And how to resolve the problem?

The classic reason for this is that if your system is primarily I/O
bound, adding extra CPUs is likely to have a relatively negligible
effect on system performance.

The far-and-away most enormous increase in transactions-per-second
that people seem to see from hardware changes come from putting in a
SCSI controller with large amounts of battery-backed cache.
Additional disk drives tends to be #2.  More memory also helps.

The "problem" might very well be your expectation that adding CPUs
would necessarily have much effect on performance.
-- 
output = ("cbbrowne" "@" "cbbrowne.com")
http://www3.sympatico.ca/cbbrowne/emacs.html
DSK: STAN.K; ML EXIT -- FILE NOT FOUND