Matthew, I think you may find it's quite challenging to solve a problem like yours over an email discussion list. Many of us could offer ideas, but there would likely have to be back and forth to explain, evaluate, and reconsider things.
I will say just quickly that the 503 means that IIS couldn't get a response to the request from CF. It could be that CF is not processing any requests, or perhaps it's not processing certain requests for some reason. It could be (and is most likely) that CF is busy processing too many requests (the simultaneous request limit has been hit), and that's either a temporary problem (that comes and goes) or one that once hit, remains for a long time (and no, it doesn't matter that you have the CF Admin setting for "timeout requests after x seconds"). FusionReactor will indeed be your friend. It will spot if it's a problem of some or all requests hanging up, and it can tell you why (down to the line of code) using its stack trace feature. It can also tell you how many requests were running and completed in 5-second intervals going back possibly several days or weeks (depending on the size of your logs), which can help spot patterns. You refer to a concern over memory problems: I will note that sometimes FR's memory graphs can lead one to overstate the significance of memory issues. It really doesn't matter if any tool shows memory "high" in CF. It may be not really be the case that the memory is "in use", but instead could be merely allocated or even "marked used" but also ready to be garbage collected but just not yet GCed. I'll assume one of the links of mine you refer to is the one on memory myths. That explains more. Hope that helps. Finally, if I may be so bold, and given the significance of the problem (users getting 503 errors), it would seem far more expedient and productive to instead engage someone for even very short-term online assistance. I provide such support, with no minimum time required and satisfaction guaranteed (if we don't solve the problem, and you feel any part of the time spent was not worthwhile, you don't have to pay for that time). /charlie arehart [email protected] Providing fast, remote, on-demand troubleshooting services for CF (and CFBuilder) More at http://www.carehart.org/consulting From: [email protected] [mailto:[email protected]] On Behalf Of Matthew Nicholson Sent: Tuesday, May 10, 2011 9:55 AM To: [email protected] Subject: [ACFUG Discuss] CF8 Preformance Morning All! I was curious of all of your thoughts of what might cause you to experience a "HTTP Error 503. The service is unavailable." I'm running CF8 and have standard edition, I spent a little time reviewing the groups previous discussion over CF9 performance issues (thank you for those write-ups & links Charlie!) and will be installing FusionReactor shortly to see where my application is hanging but this does have me a little confused. Given the sporadic nature of these time outs I'd hazard to say it's something on the memory management side of the equation but I was curious if others have experienced similar time out or hanging after a 8 to 12 hours of running their site. As always, thank you all very much for your expertise! Matthew R. Nicholson SolTech, Inc. Cell: 770-833-5326 <http://www.soltech.net/> www.soltech.net To find what you seek in the road of life, the best proverb of all is that which says: "Leave no stone unturned." ~Edward Bulwer Lytton ------------------------------------------------------------- To unsubscribe from this list, manage your profile @ http://www.acfug.org?fa=login.edituserform For more info, see http://www.acfug.org/mailinglists Archive @ http://www.mail-archive.com/discussion%40acfug.org/ List hosted by FusionLink <http://www.fusionlink.com> ------------------------------------------------------------- ------------------------------------------------------------- To unsubscribe from this list, manage your profile @ http://www.acfug.org?fa=login.edituserform For more info, see http://www.acfug.org/mailinglists Archive @ http://www.mail-archive.com/discussion%40acfug.org/ List hosted by http://www.fusionlink.com -------------------------------------------------------------
