Fwd: NETTYPE NET/CPU

---------- Forwarded message ---------- From: Jonathan Leffler <jleffler.iiug@gmail.com> Date: Aug 8, 2007 10:56 PM Subject: Re: NETTYPE NET/CPU To: "mohitanchlia@gmail.com" <mohitanchlia@gmail.com> On 8/8/07, mohitanchlia@gmail.com <mohitanchlia@gmail.com> wrote: > Version: IDS 10 > > I am trying to understand NETTYPE better so that we can configure our > connections appropriately and perhaps make it more efficient. My > questions is: > > 1. Is VP Class NET synonymous to OS's CPU and Vp Class CPU synonymous > to oninit. No. All VPs are copies of the oninit process. The CPU VPs are the VPs that handle regular SQL statements - as distinct from AIO, LIO, PIO, JVP, MSC, ADM, ADT, NET, etc VPs. NET VPs are tasked with looking after network connections and i/o only. > 2. After reading about Vp Class my understanding is that ipcshm > protocol should be configured for CPU vp class. Is that correct ? > What's the benefit of using one over other That's the received wisdom. > 3. And should soctcp protocol be configured for NET vp class. Is that > correct ? What's the benefit of using one over other Opinion diverges on this point. Inside Informix R&D, the preference is for configuring these on CPU VPs. Outside, there is support for putting soctcp connections on NET VPs. An advantage of using a NET VP is that it doesn't have anything else to do than handle network activity, so it tends to be more responsive. > 4. Also, when I do onstat -g glo I see lot of cpu type virtual > processors having total of more than 100. On IBM's website they > recommend adding one more cpu if total is more than 100, but our > application seems to be fine. So I am little bit confused about this > too. We'd need to know a lot more about your configuration to help here. Which machine are you on? How many CPUs? What are all those 'more than 100' VPs types? -- Jonathan Leffler #include <disclaimer.h> Email: jleffler@earthlink.net, jleffler@us.ibm.com Guardian of DBD::Informix v2007.0226 -- http://dbi.perl.org/ NB: Please do not use this email for correspondence. I don't necessarily read it every week, even. -- Jonathan Leffler #include <disclaimer.h> Email: jleffler@earthlink.net, jleffler@us.ibm.com Guardian of DBD::Informix v2007.0226 -- http://dbi.perl.org/ NB: Please do not use this email for correspondence. I don't necessarily read it every week, even.