John Kaster

Behind the Screen

When all else fails, reboot!

with 6 comments

The last few days, CodeCentral has been having significant delays when loading pages. Currently, there are two machines involved in serving CodeCentral pages: the web server, and the database server. I looked at both machines, and could detect no performance issues on either machine. I even used the performance monitor from InterBase’s IBConsole to look for problems with the database, and couldn’t find any. John Hornyak from our IS department (one of my go-to guys who knows more about networking than I’ll ever want to know) did the usual network load monitoring stuff  too. There were no problems detected.

But we were still having performance problems.

So, out of desperation, we rebooted both machines. Now, pages that were taking 7 seconds (or more, in too many cases) to load are now loading back at their "normal" speed of well under 1 second. Please report any other issues with CodeCentral to the CodeCentral newsgroup with as much detail as you can, so I can get any problems resolved quickly. Sorry for the performance issues!

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Written by John Kaster

August 11, 2004 at 11:53 am

Posted in EDN

6 Responses

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  1. Wild shot: did you check how many lingering TCP connections there were? ("netstat -a" & "netstat -s")

    IF you have too many of them the performance of the MS TCP/IP collapses, but this does not translate in higher CPU or bandwidth use, just in higher latencies.

    Z

    August 11, 2004 at 10:55 pm

  2. Thanks for the suggestion and information. I’m pretty sure John Hornyak checked for that, since he’s "network" minded. However, it’s good for me to know this!

    John Kaster

    August 12, 2004 at 7:00 am

  3. My bet is that it is an SBC (PacBell) issue because
    tracerts end at their server.

    Eddie Shipman

    August 12, 2004 at 8:52 am

  4. This is misleading, because we disable tracert into our domain.

    John Kaster

    August 12, 2004 at 9:10 am

  5. if ( ccweb.exe is DelphiApplication ) and
    ( ccweb.exe uses TCGIRequest ) then
    plese check report 6143 on QualityCentral.

    Ivan Cruz

    August 12, 2004 at 1:39 pm

  6. Thanks for the suggestion (and the bug report) but this isn’t what was affecting CodeCentral.

    John Kaster

    August 12, 2004 at 1:44 pm


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