Using win 2000 server, does the problem still exists or this happend only in
NT server?

Luiz.

----- Original Message -----
From: Christian Gütter <cguetter@...>
To: <ib-support@yahoogroups.com>
Sent: Wednesday, April 18, 2001 6:58 AM
Subject: RE: [ib-support] Machines with mult-processors


> Luiz,
>
> there are no problems installing IB, but you will see that
> running IB on a dual processor machine will be slower than
> on a single proc machine.
>
> Frank Ingermann has explained this problem (and also the solution)
> very clearly in the IBObjects mailing list.
>
> So I just quote him ;-)
>
> "in short terms: you start IB under NT with 2 CPUs. IB runs on CPU 1. You
> make
> some select, IB's CPU usage pops up to 100% (for some time). NT's "smart"
> multi-cpu-handler sees: "hey, there's one cpu on a 100%, the other at 5%.
> We'll
> go and put IB on the second CPU to balance the load!" (not knowing that IB
> will
> always definitely make use of only *one* cpu). said & done.
>
> Some millisecs later: NT: "Hey, cpu 2 is overloaded! let's switch back to
> cpu 1!" (... you can guess the rest: NT is practically locked because it
is
> spending all of its time moving IB from one cpu to the other & back
again...
> and IB itself doesn't even get the few machine cycles to complete its
> job...)
>
> however, there is a cure for this: take IBAffinity (by Karsten Strobel)
from
> either www.ait-augsburg.de or ibobjects.com. This little tool modifies the
> "affinity mask" of the IBServer process in such a way that IB will be
> *bound*
> to one cpu, preventing NT from doing it's "cpu juggling".
>
> the good news is that with this fix applied, IB will indeed perform better
> on a dual-cpu machine, because NT can do all it's internal stuff on the
> first
> while IB exclusively uses the second. Moreover, should the IB process ever
> crash completely, NT will still be available to shoot it down & restart
it."
>
>
> HTH,
>
> Christian
>
>
> > -----Original Message-----
> > From: Luiz Alves [mailto:cprmlao@...]
> > Sent: Wednesday, April 18, 2001 12:24 AM
> > To: ib-support@yahoogroups.com
> > Subject: [ib-support] Machines with mult-processors
> >
> >
> > I have a machine with win 2000 server with two processors.
> > I had read about problems with multi-processors machines and NT.
> > Is there some problem installing ibserver in win 2000 in a
> > machine with
> > multi-processors?
> >
> > Thanks in advance,
> >
> > Luiz.
>
>
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