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Random website slowdowns (classic ASP) RRS feed

  • Question

  • User854084098 posted

    Hello,

     

    We are having problems with Classic ASP web site. Site is hosted on IIS 7.5, app pool runs in Integrated mode.

    The issues we are noticing are:

    -          Random web site slow downs

    -          It can take up to 2 minutes for a site to load in a browser

    -          During slowdowns, other websites are normally responsive and fast

    -          After restart of the application pool, site is fast and responsive

     

    During slowdowns we measured perf counters:

    ·         AVG number of HTTP requests / sec is 8

    ·         AVG number of GET requests / sec is 30

     

     

    There is no Network, CPU, RAM or DISK pressure, also SQL is running normally.

     

    Do you have any ideas, what could be a problem? Where should we look? The code for additional optimizations, or we need to change IIS setting for ASP sites?

     

     

    I have found article on Threads Per Processor Limit http://msdn.microsoft.com/en-us/library/ee377050%28v=bts.10%29.aspx

    Does anyone know, in what way this influences working of IIS? If we increase Threads Per Processor Limit form 25 (default) to 50? What will happen in inner workings of IIS?

     

     

     

     

    Server Specs:

    2x Xeon X5670

    70GB RAM

     

    Monday, November 21, 2011 9:35 AM

All replies

  • User-1672167363 posted

    Hi,

    Have you checked AVG Support for suggestions and the AVG Forums ?

    Maybe create an Exception for AVG Avg Support http://www.avgforums.com/viewtopic.php?f=4&t=775 .

    Martin

     

    Monday, November 21, 2011 10:06 AM
  • User-176674611 posted

    Hi,

    I suggest you turn on failed request tracing for troubleshooting. The tracing logs could tell where the long time taken. This could point the direction that we should focus on.

    @Martin, I believe AVG means average in the orginal post.

    Thanks.

     

    Tuesday, November 22, 2011 9:21 PM
  • User-1672167363 posted

    Ok,

    Agreed "believe AVG means average in the orginal post" to fast reading on my part.

    Martin

     

    Tuesday, November 22, 2011 9:26 PM
  • User854084098 posted

     I've done that and set it to show requests that executed longer than two minutes. It showed bunch of requests. Also we have one file for testing purposes (it shows hello world and it has no backend connections), that file too was executing long time.

    Thursday, November 24, 2011 10:44 AM
  • User-176674611 posted

    What does tracing logs say for the hello world page? Which stage is taking the long time? Could you please post the corresponding tracing log entries here?

    Thanks.

     

    Thursday, November 24, 2011 8:08 PM
  • User-776338287 posted

    Share the FREB traces with us. You can email me the same and I can review them for you.

    Thursday, November 24, 2011 9:01 PM
  • User-1672167363 posted

    Hi,

    You might use Kris's "Here's a website where you can show your Failed Request Tracing log"

    http://forums.iis.net/t/1181494.aspx ?

    Martin

     

    Thursday, December 1, 2011 3:23 PM
  • User-1672167363 posted

    Hello,

    You have these problems and observations:

    The issues we are noticing are:

    -          Random web site slow downs

    -          It can take up to 2 minutes for a site to load in a browser

    -          During slowdowns, other websites are normally responsive and fast

    -          After restart of the application pool, site is fast and responsive

    You have done test's and have this:

    During slowdowns we measured perf counters:

    ·         AVG number of HTTP requests / sec is 8

    ·         AVG number of GET requests / sec is 30

    IIS Forum post  http://forums.iis.net/t/1182044.aspx  "IIS7.5 slow with IE6 and IE7".

    You more information for  IIS Server.

    "Trying to Decipher Log Parser Logs" http://forums.iis.net/p/1178308/1982561.aspx#1982561 

    feel free to post the status  codes in the forum.

    Martin

     

     

     

     

    Friday, December 16, 2011 7:57 PM
  • User-1672167363 posted

    Hello,

    There have been a number of suggestions. I am not sure of the current Status.

    This  http://forums.iis.net/t/1183626.aspx "A lot of requests hang on ExecuteRequestHandler stage" might provide insights ?

    The other way is open a case with Microsoft Support http://support.microsoft.com/ 

    costs Time vs Money.

    Hope the simpler methods are possible.

    Martin

     

     

    Thursday, December 29, 2011 3:57 PM