RE: [ActiveDir] Active Directory Performance for 64-bit Versions of Windows Server 2003

Sun, 02 Apr 2006 04:09:47 -0700

> Finding a precise database size at which the 64-bit version becomes more advantageous than the 32-bit version.

Actually I believe that a 64-bit version is more advantegeous immediatelly, however if the better memory handling and higher performance will be human recognizable depends on other settings, such as your applications and their LDAP-Queries, your GPOs and Logon-Scripts (Client/User-Logon), administrative behavior a.s.o.

 

> Finding a precise amount of RAM to optimize caching the database.

LSASS is only able to consume 512MB by default in a 32-bit environment. How much memory is consumed by your LSASS depends on the DIT-Size and on other settings such as indexing, forest infrastructure and GC placement,...
You are able to monitor the memory LSASS consumes by cmd (tasklist), perfmon or other monitoring tools (Process\LSASS\Working set size or max working set size) or just taskmon. If LSASS gets closer to conuming 512MB you should put the /3GB Switch in place or run it on 64-bit Hardware/OS. However to figure out the right size of RAM you need to keep monitoring and trying at least on one server (or one DC and one GC) in your domain since memory usage adjusts on windows depending on the availability of memory.
 

Gruesse - Sincerely,

Ulf B. Simon-Weidner

  MVP-Book "Windows XP - Die Expertentipps": http://tinyurl.com/44zcz
  Weblog: http://msmvps.org/UlfBSimonWeidner
  Website: http://www.windowsserverfaq.org
  Profile:   http://mvp.support.microsoft.com/profile="">   

 

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Nicolas Blank
Sent: Sunday, April 02, 2006 10:21 AM
To: [email protected]
Subject: RE: [ActiveDir] Active Directory Performance for 64-bit Versions of Windows Server 2003

Haven’t “lurked” on the list for a while, so apologies if I’m asking the answered, however:

Bearing in mind the non-goals of the paper,

i.e.

·      Finding a precise database size at which the 64-bit version becomes more advantageous than the 32-bit version.

·      Finding a precise amount of RAM to optimize caching the database.

 

Any prescriptive guidance on these bearing in mind that most of our DIT’s contain more than just user info? Also, how do multiple processors affect 64 bit DC performance?

What about DC specific settings in 64bit environments, do these change at all, since larger cache configurations are assumed – the thinking is here that you wouldn’t bother with 64 bit dc’s without the extra memory…

 

From: Grillenmeier, Guido [mailto:[EMAIL PROTECTED]]
Sent: 02 April 2006 09:58 AM
To: [email protected]
Subject: RE: [ActiveDir] Active Directory Performance for 64-bit Versions of Windows Server 2003

 

although nothing official, we've done testing HP internally and were quite comfortable using a single well-sized 64-bit DC (well-sized meaning our whole DIT cached in memory) serving one of our sites with approx. 4 Exchange Mbx. servers (I believe all dual-proc) with a total of 20.000 mailboxes.  It worked like a charm.

 

/Guido

 

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of joe
Sent: Sonntag, 2. April 2006 09:52
To: [email protected]
Subject: RE: [ActiveDir] Active Directory Performance for 64-bit Versions of Windows Server 2003

And silence swept the community as Microsoft folks dived under desks searching for dropped pens....

 

 

I second this request pleasethankyouverymuch.

 

 

--

O'Reilly Active Directory Third Edition - http://www.joeware.net/win/ad3e.htm 

 

 

 

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jeremy Olson
Sent: Friday, March 31, 2006 12:30 PM
To: [email protected]
Subject: Re: [ActiveDir] Active Directory Performance for 64-bit Versions of Windows Server 2003

Thanks.   Looks like a really great white paper.   Anything in the works to provide updated DC sizing for exchange ?

Thanks again.

Jeremy

On 3/30/06, Steve Linehan <[EMAIL PROTECTED]> wrote:

Since it has been asked many times on the alias when will a paper be released detailing the scenarios when deploying 64-bit servers for Active Directory makes since and providing detailed analysis and numbers,  I thought everyone would be happy to know that the Active Directory Program Management and Development teams have released the following White Paper: "Active Directory Performance for 64-bit Versions of Windows Server 2003"  http://www.microsoft.com/downloads/details.aspx?FamilyID=52e7c3bd-570a-475c-96e0-316dc821e3e7&DisplayLang=en.

 

Thanks,

 

-Steve

 

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