Tunning CPU VPS and Processor Affinity
Hi everybody! I'm planning a migration from HP PA-RISC model RP3440 (4CPU X 2core) with IDS 11.10 FC2 in HP-UX 11.10 to Dell PowerEdge Server R710 (2 Sockets Xeon 2.93GHz X 4Core with 2 threads per core - HyperThread) using IDS 11.50 FC5 in Linux RHEL 5. My question is: How can I get the best performance with IDS setting CPU VPS and Processor Affinity? When I execute the htop command on RHEL 5 to monitor my environment, the Operating System "see" 16 processors. Does anybody has some tips? Thanks, Alberto.
Ignore the hyper threads and configure for the 8 physical cores. On a 2.9GHZ Xeon processor, I would not configure more than 3-4 CPU VPs per core on a dedicated IDS server machine. Less if you will be sharing the machine with client applications or other software depending on the percentage of resources you want to dedicate to IDS. On HPUX don't forget to set the aging option in the VPCLASS entries (HPUX is rather predatory at reducing the priority of long running processes that do not have process aging blocked). As to affinity, I'm not certain there's much to be gained from affinity settings on he Xeon architecture. The memory interconnects are quick and the processors are set up as SMP with equal access to all resources (as opposed to Numa architecture where migrating a task/thread from one processor group to another can be costly causing a physical memory copy). Art Art S. Kagel Oninit (www.oninit.com) IIUG Board of Directors (art@iiug.org) Disclaimer: Please keep in mind that my own opinions are my own opinions and do not reflect on my employer, Oninit, the IIUG, nor any other organization with which I am associated either explicitly or implicitly. Neither do those opinions reflect those of other individuals affiliated with any entity with which I am affiliated nor those of the entities themselves. On Mon, Oct 19, 2009 at 1:42 PM, ALBERTO ROMEU PESSONIO FILHO < arfilho@orizonbrasil.com.br> wrote: > Hi everybody! > > I'm planning a migration from HP PA-RISC model RP3440 (4CPU X 2core) with > IDS > 11.10 FC2 in HP-UX 11.10 to Dell PowerEdge Server R710 (2 Sockets Xeon > 2.93GHz > X 4Core with 2 threads per core - HyperThread) using IDS 11.50 FC5 in Linux > RHEL 5. > > My question is: > > How can I get the best performance with IDS setting CPU VPS and Processor > Affinity? > > When I execute the htop command on RHEL 5 to monitor my environment, the > Operating System "see" 16 processors. > > Does anybody has some tips? > > Thanks, > Alberto. > > > > ******************************************************************************* > Forum Note: Use "Reply" to post a response in the discussion forum. > > --0015174c3520b83d3a04764d9a94
Art: Thanks again!!!! I hope to start my tests next week, and I let you know about the performance. Regards, Alberto Pessonio |DBA Informix Senior IBM Certified Informix System Administrator V7 IBM Certified Informix Managing and Optimizing Databases V7 Tel. +55 11 4932 5147 | +55 11 7897 1458 NEXTEL ID +55 93*7118 www.orizonbrasil.com.br -----Mensagem original----- De: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] Em nome de Art Kagel Enviada em: segunda-feira, 19 de outubro de 2009 16:07 Para: ids@iiug.org Assunto: Re: Tunning CPU VPS and Processor Affinity [17621] Ignore the hyper threads and configure for the 8 physical cores. On a 2.9GHZ Xeon processor, I would not configure more than 3-4 CPU VPs per core on a dedicated IDS server machine. Less if you will be sharing the machine with client applications or other software depending on the percentage of resources you want to dedicate to IDS. On HPUX don't forget to set the aging option in the VPCLASS entries (HPUX is rather predatory at reducing the priority of long running processes that do not have process aging blocked). As to affinity, I'm not certain there's much to be gained from affinity settings on he Xeon architecture. The memory interconnects are quick and the processors are set up as SMP with equal access to all resources (as opposed to Numa architecture where migrating a task/thread from one processor group to another can be costly causing a physical memory copy). Art Art S. Kagel Oninit (www.oninit.com) IIUG Board of Directors (art@iiug.org) Disclaimer: Please keep in mind that my own opinions are my own opinions and do not reflect on my employer, Oninit, the IIUG, nor any other organization with which I am associated either explicitly or implicitly. Neither do those opinions reflect those of other individuals affiliated with any entity with which I am affiliated nor those of the entities themselves. On Mon, Oct 19, 2009 at 1:42 PM, ALBERTO ROMEU PESSONIO FILHO < arfilho@orizonbrasil.com.br> wrote: > Hi everybody! > > I'm planning a migration from HP PA-RISC model RP3440 (4CPU X 2core) with > IDS > 11.10 FC2 in HP-UX 11.10 to Dell PowerEdge Server R710 (2 Sockets Xeon > 2.93GHz > X 4Core with 2 threads per core - HyperThread) using IDS 11.50 FC5 in Linux > RHEL 5. > > My question is: > > How can I get the best performance with IDS setting CPU VPS and Processor > Affinity? > > When I execute the htop command on RHEL 5 to monitor my environment, the > Operating System "see" 16 processors. > > Does anybody has some tips? > > Thanks, > Alberto. > > > > ************************************************************************ ******* > Forum Note: Use "Reply" to post a response in the discussion forum. > > --0015174c3520b83d3a04764d9a94 ************************************************************************ ******* Forum Note: Use "Reply" to post a response in the discussion forum.