I created a ticket with BMC and they looked at the logs and said that we needed to increase our Java Heap size to 1GB. We have a Windows 2003 Mid Tier server with 2GB of RAM (7.0.1 Patch 3) and there are other apps on this server, so 1GB seemed a little excessive, so I asked "Is there a formula to figure what size the Java Heap should be?" They replied:
There is no formula for calculating the heap size. The default heap size on Tomcat is 64mb.Our recommendation to increase the heap size is based on the error we're seeing in the Tomcat log. For large applications such as ITSM 6 we recommend a heap size of 512mb and for larger applications such as ITSM 7, we recommend 1G. Well, we don't have ITSM 6 or 7, just AR System and Mid Tier. We've increased to 128MB so far. But my question is, does anyone have a formula or an idea of what the heap size should be? Also, does anyone have their Tomcat performance or logs monitored to notify when it's over the heap size (when the log says: Java.lang.OutOfMemory: Java Heap Space)? Lisa ________________________________ From: Action Request System discussion list(ARSList) [mailto:[EMAIL PROTECTED] On Behalf Of Averell, Graham Sent: Wednesday, September 26, 2007 4:23 AM To: [email protected] Subject: Re: Tomcat Using Full CPU on Win2003 ** Hi Lisa, Have you tried manually deleting the tomcat cache? Move or delete the Catalina dir (fine it in \Tomcat 5.5\work\ dir). It will rebuild after restarting the tomcat service. Also watch the cpu usage after stopping the tomcat service. Wait till it drops before manually restarting the service. Graham ________________________________ From: Action Request System discussion list(ARSList) [mailto:[EMAIL PROTECTED] On Behalf Of Kemes, Lisa Sent: 25 September 2007 19:52 To: [email protected] Subject: Re: Tomcat Using Full CPU on Win2003 I tried to find this .dll and did not find it. So I'm thinking that this may not be the problem. Thanks! ________________________________ From: Action Request System discussion list(ARSList) [mailto:[EMAIL PROTECTED] On Behalf Of Tony Worthington Sent: Tuesday, September 25, 2007 11:53 AM To: [email protected] Subject: Re: Tomcat Using Full CPU on Win2003 ** Lisa - Are you using the tcnative.dll? It would be in Tomcat\bin -- tcnative-1.dll or tcnative.dll I found that deleting/renaming the file fixed my 100% cpu issues. I also use mod_jk which I think plays into the problem. http://archive.netbsd.se/?ml=tomcat-dev&a=2006-11&t=2659074 If that's not the issue maybe someone else can give you further insight... -tony -- Tony Worthington Sr. Technical Analyst Kohl's Department Stores [EMAIL PROTECTED] 262-703-5911 "Kemes, Lisa" <[EMAIL PROTECTED]> Sent by: "Action Request System discussion list(ARSList)" <[email protected]> 09/25/2007 10:20 AM Please respond to [email protected] To [email protected] cc Subject Tomcat Using Full CPU on Win2003 ** We have production ARS 7.0.1 Mid-Tier Server down due to the tomcat process taking a full CPU (spinning). Stopped/restarted the service and can get in ... Mid Tier Logs: Sep 25, 2007 10:34:25 AM - WARNING (com.remedy.log.INTERNAL) : (Thread 12) The JSWRiter parameter is not set to mutiline mode. Performance might get affected due to this. Not sure how to avoid this in the future? Lisa Kemes BMC Remedy Developer Tyco Electronics 717-810-2408 tel 717-810-2124 fax [EMAIL PROTECTED] __20060125_______________________This posting was submitted with HTML in it___ __20060125_______________________This posting was submitted with HTML in it___ __20060125_______________________This posting was submitted with HTML in it___ Please consider the environment before printing this e-mail or its attachments. ________________________________ This e-mail (and any attachments) contains information, which is confidential and intended solely for the attention and use of the named addressee(s). If you are not the intended recipient you must not copy, distribute or use it for any purpose or disclose the contents to any person. If you have received this e-mail in error, please notify us immediately at [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> . The information contained in this e-mail (and any attachments) is supplied in good faith, but the sender shall not be under any liability in damages or otherwise for any reliance that may be placed upon it by the recipient. Any comments or opinions expressed are those of the originator not of NTT Europe Ltd. unless otherwise expressly stated. NTT Europe Limited is a company registered in England and Wales with company number 2307625. Registered Address: NTT Europe Ltd. 3rd Floor, Devon house, 58-60 St. Katharine's Way, London, E1W 1LB, UK. Telephone +44-20-7977-1000. Facsimile +44-20-7977-1001. Website Link: http://www.ntteurope.com <http://www.ntteurope.com/> __20060125_______________________This posting was submitted with HTML in it___ _______________________________________________________________________________ UNSUBSCRIBE or access ARSlist Archives at www.arslist.org ARSlist:"Where the Answers Are"
