topic Re: Hyperthreading under Oacle in Operating System - HP-UX

Hyperthreading under Oacle

vpar — Mon, 24 Jan 2011 13:53:16 GMT

Hi,

I'm looking for some white-paper or documents, etc.

In cases 4 cores/one-cpu, If hyperthreading is enabled, hp-ux kernel recognizes 8 cores logically. In this case, Oracle need 7 real-time daemon threads.

Is it possible configuration?

HP-UX 11.31

Re: Hyperthreading under Oacle

Alzhy — Thu, 10 Nov 2011 15:50:38 GMT

Yes -- Hyperthreading CPUs with Oracle is fully supported. And you can even get performance gains of anywhere between 15 to 30 percent. And it can even be done on the fly via the kernel param lcpu_attr.

See this thread too:

http://h30499.www3.hp.com/t5/Databases/Oracle-10g-and-turning-off-on-hyperthreading-while-db-is-up/m-p/4702325#M39686

Re: Hyperthreading under Oacle

Emil Velez — Tue, 25 Jan 2011 00:05:07 GMT

Yes it is supported and recommended.

see enclosed white paper