[THIN] Re: HP Proliant Server BIOS setting for CPU performanc e.....
- From: "Tim Mangan" <tmangan@xxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Wed, 30 Nov 2005 11:20:39 -0500
I have heard that about SQL, but not Citrix. Perhaps that relates to a SQL
datastore on Citrix. It probably would be interesting to test the 2005 SQL
server (I think it may have been released?) as I suspect that Microsoft
would have fixed it. Being Microsoft, they could have done odd things for
performance before HT was available.
Rick Mack also complains about HT in some situations, although I have not
seen problems myself.
tim
_____
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Evan Mann
Sent: Wednesday, November 30, 2005 10:30 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: HP Proliant Server BIOS setting for CPU performanc
e.....
Somewhat related/unrelated
We did some tests on our DB servers, which are 2003 SP1 with SQL Server 2000
SP3a. We ran a large DTS query which utilizies views as well as direct
table querieis. We did tis with hyperthreading on and off.
Off: 16 minutes
On: 28 minutes
Server is a Dell PE2850, dual Xeon 3.6ghz processors.
We ended up doing this, because we read an article last week that indicates
that Hyperthreading will generally hurt you more then helping you most
situations at the current time. They specifically mentionedt Citrix, SQL
Server, and Exchange in the article.
_____
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Tim Mangan
Sent: Wednesday, November 30, 2005 10:23 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: HP Proliant Server BIOS setting for CPU performanc
e.....
See whitepaper http://www.tmurgent.com/WhitePapers/WP_HyperThreading.pdf
If you don't have a problem, then great.
_____
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Schneider, Chad M
Sent: Wednesday, November 30, 2005 9:52 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: HP Proliant Server BIOS setting for CPU performanc
e.....
Huh.been doing it for years..
_____
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Tim Mangan
Sent: Wednesday, November 30, 2005 8:01 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: HP Proliant Server BIOS setting for CPU performanc
e.....
You don't want to use Hyperthreading on 2000 - there are some issues on that
OS. XP/2003 or above.
As to the mem/IO switch - I have to believe that memory is the best setting.
I don't know what the bios setting actually does, but presumably it is doing
something like playing with device priorities at the bus level.
tim
_____
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Schneider, Chad M
Sent: Wednesday, November 30, 2005 8:39 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: HP Proliant Server BIOS setting for CPU performanc
e.....
I guess I have not noticed enough of an issue with hyperthreading, to turn
it off.
_____
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of M
Sent: Tuesday, November 29, 2005 3:25 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: HP Proliant Server BIOS setting for CPU performance.....
Hello there,
I found the settings on our BL20Ps last year when i was testing
Hyperthreading on Windows 2000.
I was checking the performance of a 16 bit application and then another
server with our core apps on.
I was most disappointed when i noticed zero difference when comparing with
other identical servers (save the bios change).
We had around 30 users for testing per box
----- Original Message -----
From: Jeff Pitsch <mailto:jepitsch@xxxxxxxxx>
To: thin@xxxxxxxxxxxxx
Sent: Tuesday, November 29, 2005 5:08 PM
Subject: [THIN] Re: HP Proliant Server BIOS setting for CPU performance.....
See that's what I was thinking. all the I/O from the sessions. Mouse and
keyboard in particular.
Jeff
On 11/29/05, Matthew Shrewsbury <MShrewsbury@xxxxxxxxxxxxxxx> wrote:
Hmmm I/O is always the slowest so set it for best I/O. Of course I know
nothing on the subject but it is my best thought.
Matthew Shrewsbury, MCSE+Internet MCSE 2000 CCA Server+
Senior Network Administrator
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Jeff Pitsch
Sent: Tuesday, November 29, 2005 11:02 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN ] HP Proliant Server BIOS setting for CPU performance.....
Ok, I just came across this in the BIOS settings when I went to turn off
hyperthreading. You can set the performance for the CPU to 'optimized for
memory' or 'optimized for I/O'. It is defaulted to 'optimized for memory'.
Anyone have any thoughts on this?
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