Skip to main content
Start a Conversation

Unsolved

This post is more than 5 years old

DarinSpence

4 Posts

4738

October 13th, 2006 19:00

Can hyperthreading be disabled after installing Windows?

I have a PowerEdge 1950 with 2 dual-core processors. 

I'm running Windows 2003 Web Edition, and SQL Express Edition 2005.
 
When I view the processors, I see 8, and figured out that hyperthreading it turned on:
BIOS -> LOGICAL CPU = ENABLED.
I tried to disable this, and Windows 2003 Web Edition would no longer boot, and I was forced to "repair" install Windows 2003 Web Edition again.
 
I don't believe IIS and SQL Express 2005 utilize hyperthreading, so I think it should be turned off, correct?  I worry that it is partitioning my processors and only making "1/8th" of my total processing power available. 
Currently, when I run large queries, only 1 of the 8 processors appears to be utilized (according to Windows 2003 Task Manager / Performance tab).
 
Is there a way to turn hyperthreading off that doesn't require me to completely re-intall Windows 2003 Web Edition?
 
Thank you!
Darin Spence

paulsilverstein

8 Posts

October 18th, 2006 22:00

Windows 2003 and since SQL 2000 SP4 (I think) has support for hyperthreading, so you should be fine.
 
As for turning it off, I have recently turned off hyperthreading on a couple machines running 2000 and 2003, and SQL 2000 and everything booted up just dandy afterwards.

Was this post helpful?

View All

No Events found!

Top