I did not monitor the load, I put a WSUS server on my sms server and it cratered. Just flat could not keep up.

Persoanlly I would think it would be the strain on the DB and not the iis server. iis is just relaying the request back to  the SQL server. SQL is what is trying to determine what is authorized and what is not and updating the statistics on everything.

The WSUS blog gives a little insight. the do not mention anything about iis .. just about tuning SQL and defragging the WSUS DB.

The counts is interesting because if you use WSUS for dats, and check every 4 hours (6 times per day) that leaves you at a max of 6,700 clients per WSUS server before the server tanks.

Add SMS load on top of that and I imagine you get what I got... a more or less unresponsive server.

20,000 * 2 = 40,000 max queries per day

http://blogs.technet.com/sus/archive/2008/10/20/wsus-updates-page-times-out-while-trying-to-view-or-approve-updates.aspx

WSUS3 can support a maximum of 20,000 clients given a twice per day detection frequency but other hardware and performance related variables may cut into that:

.) If you cannot reduce the load consider improving the hardware.  Some of the SQL queries WSUS depends on can be rather performance hindering so things like memory and disk read/write access are important.

Note: One issue that just popped up a while ago caused a large number of updates (drivers) to flow to WSUS servers.  This was bad because 14,000 or so driver updates were added to the servers update count and can certainly lead to timeouts and other performance related issues.  I blogged about that issue here:

From: admin@lists.myITforum.com [mailto:admin@lists.myITforum.com] On Behalf Of Computer Update
Sent: Monday, June 29, 2009 3:41 PM
To: mssms@lists.myitforum.com
Subject: RE: [mssms] Install WSUS on existing ConfigMgr Site Server

I agree.  Of course, the bigger shops have no choice but to offload when they need to scale up.  I'm sort of interested in Todd's take on the load of the SUPDB.  If another server is set to be the active SUP and the SUPDB is left back on the primary or another WSUS box, what load is that box getting?  Seems the SUP would be doing the heavily lifting here by answering all the client requests directly.  How did you go about monitoring the load, Todd?

_________________

Brian Mason

MCSA\MCSE\MS MVP

Computer Update

www.abetterpc.com

612-636-3636

just another server to manage that you don't need, have to buy an OS and SQL license, hardware, rack space and get the permissions working for remote SUP. I have had many WSUS installed on SCCM servers and not once have I had it uninstall itself. I will say the SUP is great and I love the role but it's the most flaky of all SCCM roles too. It seems to break a lot so KISS is a good rule in my opinion.

From: "Gerlak, Matt" <MGerlak@amtrust.com>
Sent: Monday, June 29, 2009 3:15 PM
To: mssms@lists.myitforum.com
Subject: RE: [mssms] Install WSUS on existing ConfigMgr Site Server

interested in your opinion on what new set of problem would arise from installing on separate server?

From: admin@lists.myITforum.com [mailto:admin@lists.myITforum.com] On Behalf Of John Marcum
Sent: Monday, June 29, 2009 3:42 PM
To: mssms@lists.myitforum.com
Subject: RE: [mssms] Install WSUS on existing ConfigMgr Site Server

I have never had this happen and installing remotely brings a new set of problems in my opinion. I also thought there was a hotfix for this issue?

From: "Gerlak, Matt" <MGerlak@amtrust.com>
Sent: Monday, June 29, 2009 2:31 PM
To: mssms@lists.myitforum.com
Subject: RE: [mssms] Install WSUS on existing ConfigMgr Site Server

My WSUS Install on my site server removed itself twice now since October 08.

I called ms support and they told me I have two options to remove it and install it on a separate system. Or to remove the path to the MSI So it cant uninstall.

They have no fix for that issue yet and they say it only happens to installs directly on the Site server.

So if I had to do it all over again. I would put it on a separate server.

matt

From: admin@lists.myITforum.com [mailto:admin@lists.myITforum.com] On Behalf Of John Marcum
Sent: Monday, June 29, 2009 3:20 PM
To: mssms@lists.myitforum.com
Subject: RE: [mssms] Install WSUS on existing ConfigMgr Site Server

I don't think so. I have never noticed anything at all from adding wsus to my site servers.

From: "Hemsell, Todd" <Todd.Hemsell@lyondellbasell.com>
Sent: Monday, June 29, 2009 10:47 AM
To: mssms@lists.myitforum.com
Subject: RE: [mssms] Install WSUS on existing ConfigMgr Site Server

WSUS will add a lot of load to your SMS server if the DB is hosted on it.

From: admin@lists.myITforum.com [mailto:admin@lists.myITforum.com] On Behalf Of Stewart Woollaston
Sent: Monday, June 29, 2009 10:06 AM
To: mssms@lists.myitforum.com
Subject: Re: [mssms] Install WSUS on existing ConfigMgr Site Server

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