Eric Fleischman
Mon, 06 Dec 2004 13:27:27 -0800
I'll take care of cleaning up this content issue with the content team. ~Eric -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jorge de Almeida Pinto Sent: Monday, December 06, 2004 3:14 PM To: 'Renouf, Phil '; '[EMAIL PROTECTED] '; '[EMAIL PROTECTED] ' Subject: RE: [ActiveDir] Stress testing and performance analysis of domain controllers Now this is fun: According to MS-KBQ291988 (http://support.microsoft.com/kb/291988) QUOTE: Caution The /3GB switch in Windows Server 2003, Standard Edition is only for development and testing purposes. Microsoft does not support using the /3GB switch in Windows Server 2003, Standard Edition in a production environment. The /3GB switch can cause some applications to have problems that are related to address dependencies or to a reduction in kernel space. According to MS-KBQ308356 (http://support.microsoft.com/?id=308356) QUOTE: If you plan to use more than 1 GB of physical memory on the domain controller, use Windows 2000 Advanced Server, Windows 2000 Datacenter Server, Windows Server 2003, Standard Edition, Windows Server 2003, Enterprise Edition, or Windows Server 2003, Datacenter Edition. You can use the /3GB switch in the %SystemDrive%\Boot.ini file on these versions of Windows to provide an additional 1 GB of addressable memory. However, if you use this switch with Windows 2000 Server, this memory space is marked as unavailable. For additional information about memory configuration tuning, click the following article number to view the article in the Microsoft Knowledge Base: 291988 A description of the 4 GB RAM tuning feature and the Physical Address Extension switch According to "W2K3 Deployment Kit - Designing and Deploying Directory and Security Services" Chapter 4 "Planning Domain Controller Capacity" QUOTE: Note The /3GB switch can be added to domain controllers that are running Windows Server 2003, Standard Edition; Windows Server 2003, Enterprise Edition; and Windows Server 2003, Datacenter Edition. Do not add the /3GB switch to the Boot.ini file if you have less than 2 GB of physical memory. Very nice.... 2 different statements according to the /3GB switch Does any one know which one is true? Personally I think MS-KBQ291988 is correct because of the date of the article -> 15 nov 2004 Regards, Jorge -----Original Message----- From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: 12/6/2004 6:12 PM Subject: RE: [ActiveDir] Stress testing and performance analysis of domain controllers You don't need the /3GB switch for a DC. Just having more than 2GB of ram does not require using the /3GB switch, systems like Exchange require it, but a DC shouldn't need it. Phil -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ruston, Neil Sent: Monday, December 06, 2004 11:57 AM To: '[EMAIL PROTECTED]' Subject: [ActiveDir] Stress testing and performance analysis of domain controllers As part of a more general AD design refresh, I am re-visiting the DC hardware and OS configuration. I am proposing several changes to the DC spec, including the adoption of the following: * Use 4Gb RAM * Use /3gb switch * Place AD logs and database on separate disk spindles In order to 'sell' this idea, I would like to demonstrate the effective increase in 'horse power' that the above offers. I am therefore looking for a tool which can help me to show that a DC with config A can handle load x whilst DC spec B can handle load y. Ideally, this tool will act much like loadsim and simulate a load on the DC so as to identify the maximum load that each config is capable of handling. Is there such a tool available on the market? Thanks in advance, Neil Neil Ruston - MVP Directory Services ======================================================================== ====== This message is for the sole use of the intended recipient. If you received this message in error please delete it and notify us. If this message was misdirected, CSFB does not waive any confidentiality or privilege. 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