lamigo@atc.unican.es ("Luis Alberto Amigo Navarro") writes:
> we're running on sgi powerchallenge, 8 r10000 4-way smp, and we're> getting bad performance from postgres, throughput
increasesfrom 1> to 5 streams, but from 5 and above there is no further increase,> performance analysis show high sleep
waitingfor resources
IIRC there is a bottleneck on calls to sleep() or similar on IRIX
SMP. All requests are dealt with on just one of the CPUs. I don't
recollect whether there is a way to work around that or whether
programs need to be rewritten.
--
Pete Forman -./\.- Disclaimer: This post is originated
WesternGeco -./\.- by myself and does not represent
pete.forman@westerngeco.com -./\.- opinion of Schlumberger, Baker
http://petef.port5.com (new) -./\.- Hughes or their divisions.
