IIS6 problem

Jonathan Maltz [MS-MVP] wrote:
 > Hi,
 >
 > The HTTP standard allows clients to download over only 2 connections
 > simultaneously. Internet Explorer keeps that standard. Each image
 > uses a connection, so it is really only downloading 2 at a time, just
 > quickly so it looks faster.

Thanks for you answer, but this doesn't answer to my question, because:
- another iis has no problems and sends all the images very quickly
- it doesn't explain why about 15 images arrive quick and then pause..

Any other idea? <!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: IIS6 problem 

Is the other IIS server IIS6 or not? (i.e. are you saying that this is a
problem with all IIS6 servers or just your particular one).

The fastest way I can think of to troubleshoot this issue is to take a
Netmon network trace of what you are describing.

Random "idea" guessing isn't going to help. There are too many layers
between a web server and web browser to make your observations merely
speculations, so I'm only interested in seeing if the network traffic
between the client and server have any pauses -- if there are no pauses,
then this is not an IIS issue and you can ask for speculation elsewhere. If
there are pauses and it is caused by network request/responses, it'll be
captured by the network trace and should be diagnosable.

I have seen one situation with lots of images, IIS6, and Integrated
authentication where there is an IE bug with pipelined HTTP requests that
can cause performance degredations due to extra authentication roundtrips --
and depending on the number of outstanding pipelined requests, you may see
6-8 pipelined requests over one connection (so about 12-14 requests for the
two WinInet connections that IE uses) momentarily stall due to
re-authentication. It may be related to your situation, and if so, there is
no work-around.

--
//David
IIS
This posting is provided "AS IS" with no warranties, and confers no rights.
//
"Massi" <niusgruppi.TakeThisOut@despammed.com> wrote in message
news:wbYic.23421$eR5.10554@tornado.fastwebnet.it...
Jonathan Maltz [MS-MVP] wrote:
 > Hi,
 >
 > The HTTP standard allows clients to download over only 2 connections
 > simultaneously. Internet Explorer keeps that standard. Each image
 > uses a connection, so it is really only downloading 2 at a time, just
 > quickly so it looks faster.

Thanks for you answer, but this doesn't answer to my question, because:
- another iis has no problems and sends all the images very quickly
- it doesn't explain why about 15 images arrive quick and then pause..

Any other idea? <!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: IIS6 problem