IIS has suddenly slowed to a crawl

I have a Windows 2003 development server, that has only a handful of
websites. It is an Intel Dual Core cpu with 2 gig of ram. The server is
running typically at 1% of cpu, and is never pegged. For some reason, IIS is
serving even simple HTML pages at a snails pace. See the page
http://kitt.us. This is a very simple 'under construction' page. It takes a
good minute or so to serve this page, but during that time, the cpu never
exceeds 2% or 3%. The machine itself is very responsive, and any app running
on the server runs fine. The slow down is only in IIS. Since this is a
development server, I do have auto updates on. No other changes have been
made recently. I don't see any errors in the Event log, and I can't find any
reason for it to be so slow. Any ideas where I can start looking for the
slow down?

Another strange note: When I go after Exchange, from web based interface,
it is extremely responsive. I don't understand why all of my websites are
painfully slow, but the webmail (coming from the same IIS) is very
responsive? Any ideas greatly appreciated.

Re: IIS has suddenly slowed to a crawl

On Oct 17, 3:19 pm, Brian Kitt
wrote:
> I have a Windows 2003 development server, that has only a handful of
> websites. It is an Intel Dual Core cpu with 2 gig of ram. The server is
> running typically at 1% of cpu, and is never pegged. For some reason, IIS is
> serving even simple HTML pages at a snails pace. See the pagehttp://kitt.us. This is a very simple 'under construction' page. It takes a
> good minute or so to serve this page, but during that time, the cpu never
> exceeds 2% or 3%. The machine itself is very responsive, and any app running
> on the server runs fine. The slow down is only in IIS. Since this is a
> development server, I do have auto updates on. No other changes have been
> made recently. I don't see any errors in the Event log, and I can't find any
> reason for it to be so slow. Any ideas where I can start looking for the
> slow down?
>
> Another strange note: When I go after Exchange, from web based interface,
> it is extremely responsive. I don't understand why all of my websites are
> painfully slow, but the webmail (coming from the same IIS) is very
> responsive? Any ideas greatly appreciated.


Create a virtual directory under Exchange's website and point it to
your "under construction" page. Does it run fast or slow?

If it runs fast, then you probably made some configuration of your
websites that cause them to be slow. I would start with any site-
specific ISAPI Filters or Extensions which are configured. If it still
runs slow, then the problem may be with your application itself.

"Slow performance" does not necessarily result in CPU usage, nor will
you get event log errors. If code is having thread contention, it will
be very slow yet use literally no CPU.


//David
http://w3-4u.blogspot.com
http://blogs.msdn.com/David.Wang
//

Re: IIS has suddenly slowed to a crawl

"Brian Kitt" wrote in message
news:94E4F0F9-A437-4DAC-9ED4-C5212E7DC70C@microsoft.com...
>I have a Windows 2003 development server, that has only a handful of
> websites. It is an Intel Dual Core cpu with 2 gig of ram. The server is
> running typically at 1% of cpu, and is never pegged. For some reason, IIS
> is
> serving even simple HTML pages at a snails pace. See the page
> http://kitt.us. This is a very simple 'under construction' page. It
> takes a
> good minute or so to serve this page, but during that time, the cpu never
> exceeds 2% or 3%. The machine itself is very responsive, and any app
> running
> on the server runs fine. The slow down is only in IIS. Since this is a
> development server, I do have auto updates on. No other changes have been
> made recently. I don't see any errors in the Event log, and I can't find
> any
> reason for it to be so slow. Any ideas where I can start looking for the
> slow down?
>
> Another strange note: When I go after Exchange, from web based interface,
> it is extremely responsive. I don't understand why all of my websites are
> painfully slow, but the webmail (coming from the same IIS) is very
> responsive? Any ideas greatly appreciated.

http://www.windowsecurity.com/articles/Hidden_Backdoors_Troj an_Horses_and_Rootkit_Tools_in_a_Windows_Environment.html


If you don't have malware, then you can also use Process Explorer and look
at processes. You can use Google and look-up articles on PE on how to use PE
effectively to look at processes and trouble shoot with PE.

Re: IIS has suddenly slowed to a crawl

I tried that, but Exchange keeps intercepting the call, and won't pass the
call back to IIS, so I can't do that.

It can't possibly be the 'application'. The test page at
'http://kitt.us/Index.htm' is nothing more than a simple HTML page with a few
images. There is nothing there requiring .NET, or any other langauge. That
was my barometer, since HTML is serving up slow, I know it is something much
more global than my app.

The only ISAPI filter I have is below. I did not install this, it must have
been done by some other task. Should I delete this?
C:\Program Files\Common Files\Microsoft Shared\Web Server
Extensions\50\bin\fpexedll.dll

"David Wang" wrote:

> On Oct 17, 3:19 pm, Brian Kitt
> wrote:
> > I have a Windows 2003 development server, that has only a handful of
> > websites. It is an Intel Dual Core cpu with 2 gig of ram. The server is
> > running typically at 1% of cpu, and is never pegged. For some reason, IIS is
> > serving even simple HTML pages at a snails pace. See the pagehttp://kitt.us. This is a very simple 'under construction' page. It takes a
> > good minute or so to serve this page, but during that time, the cpu never
> > exceeds 2% or 3%. The machine itself is very responsive, and any app running
> > on the server runs fine. The slow down is only in IIS. Since this is a
> > development server, I do have auto updates on. No other changes have been
> > made recently. I don't see any errors in the Event log, and I can't find any
> > reason for it to be so slow. Any ideas where I can start looking for the
> > slow down?
> >
> > Another strange note: When I go after Exchange, from web based interface,
> > it is extremely responsive. I don't understand why all of my websites are
> > painfully slow, but the webmail (coming from the same IIS) is very
> > responsive? Any ideas greatly appreciated.
>
>
> Create a virtual directory under Exchange's website and point it to
> your "under construction" page. Does it run fast or slow?
>
> If it runs fast, then you probably made some configuration of your
> websites that cause them to be slow. I would start with any site-
> specific ISAPI Filters or Extensions which are configured. If it still
> runs slow, then the problem may be with your application itself.
>
> "Slow performance" does not necessarily result in CPU usage, nor will
> you get event log errors. If code is having thread contention, it will
> be very slow yet use literally no CPU.
>
>
> //David
> http://w3-4u.blogspot.com
> http://blogs.msdn.com/David.Wang
> //
>
>

Re: IIS has suddenly slowed to a crawl

Thanks.

This is a server that only I have access to. I do not have mail enabled on
it, and I do not use IE. Therefore, in theory anyway, I shouldn't have a
virus or spyware or malware. However, just to be safe, I did do a full scan
with Symantec Anti Virus v10 Corporate. No hits. I also downloaded,
installed Spybot, and ran that. Also, no hits. I do actually have process
explorer already, and from everything I can see on that, the machine is
extremely underutilized. Nothing in process explorer is giving me any
indication why serving a simple single HTML page is taking a minute. I also
know it is not my connection, because I am on Cox Business account, and speed
tests that I

"Mr. Arnold" wrote:

>
> "Brian Kitt" wrote in message
> news:94E4F0F9-A437-4DAC-9ED4-C5212E7DC70C@microsoft.com...
> >I have a Windows 2003 development server, that has only a handful of
> > websites. It is an Intel Dual Core cpu with 2 gig of ram. The server is
> > running typically at 1% of cpu, and is never pegged. For some reason, IIS
> > is
> > serving even simple HTML pages at a snails pace. See the page
> > http://kitt.us. This is a very simple 'under construction' page. It
> > takes a
> > good minute or so to serve this page, but during that time, the cpu never
> > exceeds 2% or 3%. The machine itself is very responsive, and any app
> > running
> > on the server runs fine. The slow down is only in IIS. Since this is a
> > development server, I do have auto updates on. No other changes have been
> > made recently. I don't see any errors in the Event log, and I can't find
> > any
> > reason for it to be so slow. Any ideas where I can start looking for the
> > slow down?
> >
> > Another strange note: When I go after Exchange, from web based interface,
> > it is extremely responsive. I don't understand why all of my websites are
> > painfully slow, but the webmail (coming from the same IIS) is very
> > responsive? Any ideas greatly appreciated.
>
> http://www.windowsecurity.com/articles/Hidden_Backdoors_Troj an_Horses_and_Rootkit_Tools_in_a_Windows_Environment.html
>
>
> If you don't have malware, then you can also use Process Explorer and look
> at processes. You can use Google and look-up articles on PE on how to use PE
> effectively to look at processes and trouble shoot with PE.
>
>