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gkramer_1
Participant
December 3, 2010
Question

CF Line Debugging: CPU Load

  • December 3, 2010
  • 1 reply
  • 1467 views

I've enabled Eclipse Debuggin for my CF application. I managed this with the Line Debugging option within CF Admin, which works perfectly. The Problem is, that seconds after I activated the Line Debugger on my server, the CPU load goes to 100%. This slows down my server and the application.

I already tried to give more RAM to my CF Server, that wasn't helping.

Is there any solution to this problem?

    This topic has been closed for replies.

    1 reply

    Charlie Arehart
    Community Expert
    Charlie ArehartCommunity Expert
    Community Expert
    December 5, 2010

    There's no obvious explanation for that. I've never heard of the debugger causing a CPU problem. I'd suggest that whatever is happening, it's quite unusual.

    Are you saying that it is in fact the jrun process (which underlies CF) that's reporting being at 100% CPU? If it is, have you viewed what the CF "runtime logs" say (not the cf "logs")? There may be some other problem that precedes the seeming "100% cpu" problem, and it may or may not be a memory problem. I discuss those logs and such problems in a recent blog entry:

    http://www.carehart.org/blog/client/index.cfm/2010/11/3/when_memory_problems_arent_what_they_seem_part_1

    That's a long URL, so if it splits over multiple lines as you view it here, please join them back together to paste into your browser.

    Finally, is the server that's being debugged one that is running either CF Enterprise or the Developer edition? With those, you can run the CF Server Monitor, which allows you to see running requests. That may be insightful for you to know what requests, if any, are running as you observe this problem. For more on the server monitor, see a 4-part series of articles I did when CF8 came out, starting at:

    http://www.carehart.org/articles/#2007_2

    Hope that's helpful. Let us know what you find if you do not resolve the problem.

    /charlie arehart

    charlie@carehart.org

    Providing CF and CFBuilder troubleshooting services

    at http://www.carehart.org/consulting

    /Charlie (troubleshooter, carehart. org)
    G
    gkramer_1Author
    Participant
    December 10, 2010

    Thank you very much for your answer.

    We checked the logs, as you recomented, but there were just timeout messages.

    We activated another CPU for our server. By activating the CF Line Debugger option afterwards, we could recognise, that our CPU load remain stable but it stills slows down the server. Thus the whole server is slowly reacting, we receive the timeout errors.

    Server Product:              ColdFusion

    Version:                        9,0,0,251028 

    Edition:                         Enterprise 

    Operating System:         Windows Server 2008 

    OS Version:                   6.0

    Java Version:                 1.6.0_20

    Datenbank:                    MSSQL 2008 (NICHT im Rückwärtskompatibilitätsmodus)

    DB-Driver:                      JDBC 2.0

    CPU:                             Dual-Core AMD Opteron Processor 8218 2.61 GHz

    Memory (RAM):              4.00 GB

    Thanks for your help.

    C
    carl type3
    Legend
    December 10, 2010

    Hello,

    Well sounds like two things you are sure of the CPU load and how it is related to line debugging. If the debugging is turned off does the CPU usage return to the former state? It is CF consuming the CPU and not sometime else - run TASKMANGR, process tab, view CPU time (might have to add that), JRun.EXE is the item taking most the time?

    I see from the list you are on CF9, perhaps you do well to apply updater1 to bring it to CF9.0.1. Note tho there might be a problem for you with the updater1 as I see JVM is 1.6.0_20 and updater1 will perhaps want to switch to JVM _17. I raise it because likely you are using _20 for something and may need to enable _20 post update1 if indeed you decide to apply it or if it switches to _17.

    You have Enterprise so can use CFMonitor. Does CFMonitor provide any clues?

    There you go from one fellow CF user to another once again more questions than answers.

    HTH, Carl.

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