RE: Oracle Licences Req on Intel Xeon CPU

Yes Redhat Advanced Server 2.1 does support hyperthreading. Its not to bad either. I ran some tests and we get about a 15% increase in performance with hyperthreading turned on.

-----Original Message-----
Sent: Wednesday, March 26, 2003 8:09 AM
To: Multiple recipients of list ORACLE-L

2000 only shows 2 CPUs because it cannot take advantage hyperthreading.
>From what I have read (Intel's website, some others), hyperthreading
requires both BIOS and OS support to be utilized. Currently, XP and the newer Linux releases are all that I have seen that will take advantage of it.

My research on this was fairly light since I was just after can Redhat Advanced Server support it, but I do remember seeing that W2K would not.

--
Michael Brown				Glen Raven, Inc./Info Services
Senior Oracle DBA			1831 N. Park Ave
Phone: (336)586-1146			Glen Raven, NC 27217
Fax: (336)586-1382			mbrown_at_glenraven.com


-----Original Message-----
Sent: Wednesday, March 26, 2003 3:44 AM
To: Multiple recipients of list ORACLE-L


Depending on the OS, Microsoft has different CPU counts.  The Windows
2000 family
counts each hyper thread as 1 CPU.  In contrast, Windows XP and Windows
2003 Server
count each CPU instead of each hyper thread.  Thus, the task manager in
Windows XP
Professional show 4 CPU's (on a dual XEON CPU computer with hyper threading
enabled) while Windows 2000 Professional only shows 2 CPU's in the task
manager.

Have Fun :)

tjambu_fatcity_at_yahoo.com.au wrote:



>Hi all

>

>For those that are running or intending on running Oracle on

>Intel's Xeon CPU, the following information may be of interest to you.

>

>The Xeon CPU has a feature called Hyper Threading with double the number

>of registers.   This feature when turned will present to the Operating

>Systems an additional virtual CPU.  As far as the O/S is concern, it

>looks like there are _two_ CPUs.  What does this mean to your software

>licensing?

>

>Microsoft says that it is one CPU.  What does Oracle say?

>

>Well, it depends on who you speak to and what day of the week it is.

>Seriously, you will need to get some confirmation in writing from your

>account manager the next time you purchase Oracle S/w for Intel's Xeon

>

>ta

>tony

>

> _____       ________ / ____|Tony Jambu, Database&Web Consultant

>  /_  _        /_ __ /      |Wizard Consulting Pty Ltd

> /(_)/ )(_/ \_/(///(/_)/_(  |IOUG's Select Asia-Pacific Tech. Editor

> \_______/                  |EMAIL: TJambu @ wizard.cx  (REMOVE Spaces from

email )


>----------------------------|PHONE: +61-419-TJAMBU(852628)

>

>

>




--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: Chip
  INET: ocp-dba_at_earthlink.net

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: david hill
  INET: david.hill_at_lechateau.ca

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).