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.
On Fri, Mar 9, 2012 at 1:24 PM, John R Pierce pierce@hogranch.com wrote:
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
On 03/09/12 12:02 AM, Kaushal Shriyan wrote:
This servers would be used for MySQL DB purpose. I suppose it would be IO bound instead of CPU cycles. Please help me understand.
if you have a large number of client->sql connections and concurrent queries, and lots of ram for caching, more hardware threads almost always helps.
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of John R Pierce Sent: den 9 mars 2012 08:54 To: centos@centos.org Subject: Re: [CentOS] HT (Hyper Threading) on CentOS 5.5
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.
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Thanks.
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John R Pierce -
Kaushal Shriyan -
Sorin Srbu