Re: Can we use Multiprocessor Option?

Posted in 2000

Obnoxio The Clown — Thu, 09 Mar 2000 17:15:11 GMT — source: Informix-list mailing list archive (1991-1998)

From: honda75@aol.com (Honda75) > >We have an IBM RS/6000 with 2 processors, running AIX 4.3.3 and Informix >Online >7.31. In onmonitor there is a multiprocessor option, and our setting is set >as >if we had 1 processor. I have been told that we should only use the >multiprocessor option if we have 3 or more processors. Is this true and if >so, >does anyone know why? It *may* be true, and the reason is that in some cases the overhead of managing SMP can be greater than the benefits of only implementing 2 CPUs. But it's like the BOFH says about testing to see if a power cable is live: "you have to suck it and see"... ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

↪ replying to Obnoxio The Clown

Ralf Peters — Fri, 10 Mar 2000 09:41:22 +0800 — source: Informix-list mailing list archive (1991-1998)

Hey you Clown ;-) Whats a BOFH "Obnoxio The Clown" <obnoxio@hotmail.com> wrote in message news:8a8o0q$rlj$1@news.xmission.com... > > From: honda75@aol.com (Honda75) > > > >We have an IBM RS/6000 with 2 processors, running AIX 4.3.3 and Informix > >Online > >7.31. In onmonitor there is a multiprocessor option, and our setting is set > >as > >if we had 1 processor. I have been told that we should only use the > >multiprocessor option if we have 3 or more processors. Is this true and if > >so, > >does anyone know why? > > It *may* be true, and the reason is that in some cases the overhead of > managing SMP can be greater than the benefits of only implementing 2 CPUs. > But it's like the BOFH says about testing to see if a power cable is live: > "you have to suck it and see"... > ______________________________________________________ > Get Your Private, Free Email at http://www.hotmail.com >