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View Full Version : High Server CPU Usage Due to JRun



twalters84
10-14-2008, 03:38 AM
Hey there,

My client just bought a dedicated server for his website lukebouman.com. The only other website on this server is greenhappenshere.com.

We have been having problems where the CPU Usage gets to about 50% to 70% due to JRun. We are able to see this much under the task manager.

I noticed if I restart the coldfusion 8 application server service the CPU usage drops to almost 0 percent. When I do that, everything goes smoothly for a few hours. However, the high CPU usage issue reoccurs after a few hours.

One developer told me this could be due to session variables. However, the application.cfm file is the only place where session variables are being used. Everytime a session variable is read or written to I am using cflocks.

I also noticed the log files have quite a few exceptions in them. Most of the exceptions are requests timing out.

I really need to figure out the cause of this high CPU usage due to JRun. If anybody has experienced a similar issue, please contact me either on here or via direct email.

Thank you all in advance for any information you can provide me with.

Sincerely,
Travis Walters
admin@codebuyers.com

gocats
02-19-2009, 06:16 AM
Hi there, I know this is an old post but did you ever work out the problem with your ColdFusion high CPU usage problem? I'm experiencing the same problem. After restarting CF8 (Standard) all is good for a few hours but it then goes back up to high CPU usage. Any ideas for me?

twalters84
01-06-2010, 02:56 PM
Hey there,

Sorry I did not see your message sooner.

If you are still have this problem, try storing your client variables in a database instead of the registry. Check adobe for a script to clean client variables out of your registry. You can set a script to purge the database daily. If you have not done this yet, you may experience a system crash like we did.

Hope this helps.

Sincerely,
Travis Walters



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