[CentOS] HT (Hyper Threading) on CentOS 5.5

Kaushal Shriyan kaushalshriyan at gmail.com
Fri Mar 9 03:02:44 EST 2012


On Fri, Mar 9, 2012 at 1:24 PM, John R Pierce <pierce at hogranch.com> wrote:

> On 03/08/12 11:44 PM, Sorin Srbu wrote:
> > I know there might be some negative performance issues with certain
> > applications, but would you notice it in day-to-day use?
>
> if you're using the server for pure floating point compute, don't run
> more threads than you have actual cores.   high concurrency server
> workloads that aren't IO bound generally benefit quite a lot from using
> hyperthreads to double the number of active workers.   the HT on the
> X5600 and such newer Xeons is quite a lot better than the old
> netburst/p4 architecture where the benefits were marginal in many cases.
>
>
>
>
Hi Pierce

This servers would be used for MySQL DB purpose. I suppose it would be IO
bound instead of CPU cycles. Please help me understand.

Regards

Kaushal





>  --
> john r pierce                            N 37, W 122
> santa cruz ca                         mid-left coast
>
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