nanog mailing list archives
Re: Quick question.
From: "Alexei Roudnev" <alex () relcom net>
Date: Wed, 4 Aug 2004 21:54:11 -0700
I am sorry, but I do not make a theory - I just repors practical results. 2 CPU systems are much more stable than 1 CPU system, in my experience. You are free to find an explanatiion, if you want -:).
On Wed, 4 Aug 2004, Paul G wrote:the second cpu buys you time - it is unlikely you're going to be able to react in time on a busy single cpu box with a runaway process (it launches into a death sprial almost immediately), but you would usually have 10-15 mins on a dual cpu box at a minimum or maybe infinity if you enforce cpu affinity for apps that tend to misbehave.Why do you have 10-15 mins? If the application is multi-threaded and has a reasonable workload, there are plenty of types of bugs that will result in one spinning thread after the other, you need far more than just 2 CPUs! Or maybe your application vendor has "at least 10minutes between hitting bugs!" on it's feature list? ;) Really, what you to need do is (in the face of such buggy apps) is to set per-task CPU time resource limits appropriate to how much cpu-time a task needs and how much you can afford - be it a 1, 2 or n CPU system.paulregards, -- Paul Jakma paul () clubi ie paul () jakma org Key ID: 64A2FF6A Fortune: I came to MIT to get an education for myself and a diploma for my mother.
Current thread:
- RE: Quick question. Michel Py (Jul 31)
- RE: Quick question. Michael Loftis (Jul 31)
- Re: Quick question. Alexei Roudnev (Jul 31)
- Re: Quick question. Alexei Roudnev (Jul 31)
- RE: Quick question. Paul Jakma (Aug 01)
- Re: Quick question. Alexei Roudnev (Aug 03)
- Re: Quick question. Paul Jakma (Aug 03)
- Re: Quick question. Paul G (Aug 03)
- Re: Quick question. Paul Jakma (Aug 04)
- Re: Quick question. Paul G (Aug 04)
- Re: Quick question. Alexei Roudnev (Aug 04)
- Re: Quick question. Paul Jakma (Aug 04)
- Re: Quick question. Tony Li (Aug 05)
- Re: Quick question. Alexei Roudnev (Aug 03)
- RE: Quick question. Michael Loftis (Jul 31)
- Re: Quick question. Alexei Roudnev (Aug 04)
- Re: Quick question. Adrian Chadd (Aug 04)
- Re: Quick question. Alexei Roudnev (Aug 04)
- <Possible follow-ups>
- RE: Quick question. Michel Py (Jul 31)
- Re: Quick question. Alexei Roudnev (Jul 31)
- RE: Quick question. Erik Bais (Aug 01)
- RE: Quick question. Michel Py (Jul 31)
- Re: Quick question. Joshua Brady (Aug 01)