First of all - having memory tracking enabled in your production server is going to make it crawwwwwl ;o)
I would start with thread dumps. You can do this through the monitor (there is a snapshot feature that I believe does this), although setting up a cron job or similar to fire the Java commands neccessary to get it to happen on interval wouldn't be bad. May just be easier to do it when the CPU spikes - I leave it up to you, but grab a few at least. Then use a tool like Thread Dump Analyzer - so you can see what ColdFusion is actually doing under the hood. Once you can see what is actually going on - you should be able to see what is causing the problem. Mark On Thu, Jan 21, 2010 at 8:37 AM, Ian Skinner <[email protected]> wrote: > > Any good information on how to track down what is causing a ColdFusion > server to behave badly. > > The symptoms we have to date: > > 1) Starting January 5th, our Windows 2003, ColdFusion Web Server will > suddenly jump from under 5% CPU usage to an average over 50% with > frequent spikes to 80%, 90% and over. > > 2) When this happens the JRun process for our main JRun process will be > running with over 600,000kb of memory. > > 3) Restarting this ColdFusion instances resets the server back to it's > normal 5% CPU usage. > > 4) When I point the Administrator monitor at the server nothing seems to > be obviously wrong > > 5) *EXCEPT* The monitor will sometimes report an Application Scope of > nearly 821,000,000,000,000kb. Yes, that is over 100 petabytes of data > according to Wolfram-Alpha. I am pretty sure we do not have that much > memory on this server. > > The weird thing is that there does not seem to be a correlation between > that impossible memory spike and the problem with the server. I have > been able to see the spike twice since I have started monitoring things > yesterday. Once this occurred during a problem period, once it did not. > > Using the monitor and looking at the various log files, I can not find > any clear smoking gun, so I am looking for advice on how one my track > down an elusive problem like this. > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:329862 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
