The only difference I see between your environment is your version of java, your operating system that mid-tier is installed on, and the fact that we do not use flashboards to know if displaying them would cause tomcat to crash (we are on ITSP that has no flashboards out of the box).
Its over 24 hours now that we upgraded our production to patch 006 (we have 10 mid tier servers behind a load balancer) and none of the servers have crashed as yet whereas on an average with patch 003 at least 5 of them would have crashed in a day. On one freak day we had 9 of them crash. Joe ________________________________ From: strauss <[email protected]> To: [email protected] Sent: Tuesday, February 3, 2009 4:20:10 PM Subject: Re: Apache Tomcat Memory Pool ** Windows 2003 Enterprise x86 dev w 3 gb ram and 4 cores (production is x64 with 12 gb RAM and 8 cores, but I don’t have hardware for equivalent dev box). Dev was running fine as 7.1.00.002 mod with 7.0.00.006 *70 dlls to work properly with CCMCalendar. Flashboards was fine except for the “normal” errors in the mid-tier log. Tomcat was 5.5.26 per instruction from support last spring, since rescinded. Removed mid-tier and tomcat. Installed mid-tier 7.1.00.006 with bundled tomcat 5.5.25. Upgraded Flashboards to 7.1.00.005 (there is no 006). All of my java is 1.5.0_14 and will remain that way – has been stable for a year with 7.1.00.x code. Flashboards is now crashing in SOME consoles, not others (Change, not Incident or Asset). Was crashing ALL the time until I reinstalled it again… CCMCalendar crashing too, now – had not checked it in a while, though. Lots more testing to do, but it’s hardly stable. Christopher Strauss, Ph.D. Call Tracking Administration Manager University of North Texas Computing & IT Center http://itsm.unt.edu/ From:Action Request System discussion list(ARSList) [mailto:[email protected]] On Behalf Of Joe DeSouza Sent: Tuesday, February 03, 2009 3:07 PM To: [email protected] Subject: Re: Apache Tomcat Memory Pool ** Chris, What problems are you facing? I have it running for a few weeks on UAT with no problems, and just yesterday went live on production and no problems so far. It seems to have ceased crashing as regulary as it used to. I am using Tomcat 5.5.25 and java 1.6 (I can get you the exact version if you want that.). And I have my max memory set as reccommended earlier on this thread by me (about 65% of the total available free memory before tomcat is started with every other service besides tomcat started).. Are you on unix or windows? I am on UNIX. Cheers Joe ________________________________ From:strauss <[email protected]> To: [email protected] Sent: Tuesday, February 3, 2009 3:41:49 PM Subject: Re: Apache Tomcat Memory Pool ** So far all of my attempts to build a stable mid-tier on 7.1.00.006 to replace 002 are failing, with flashboard and CCMCalendar crashes killing the mid-tier tomcat 5.5.25 instance. Considering that the production tomcat 5.5.26 under mid-tier 7.1.00.002 has crashed only once in the last nine months (last October), I’m not convinced yet that 006 is any improvement. Am working with support on it… Christopher Strauss, Ph.D. Call Tracking Administration Manager University of North Texas Computing & IT Center http://itsm.unt.edu/ From:Action Request System discussion list(ARSList) [mailto:[email protected]] On Behalf Of Joe DeSouza Sent: Tuesday, February 03, 2009 2:21 PM To: [email protected] Subject: Re: Apache Tomcat Memory Pool ** Patch 006 has definitely seen a marked decrease in the tomcat crashes we have experienced here and that too those were not becuase of OutOfMemory errors. If you view the contents of your current catalina.out file, I can bet that your crashes are due to OutOfMemory errors. Another useful tip would be to turn on incremental garbage collection. This is always good to free up unused portions of memory that haven't been used for a significant time interval. Joe ________________________________ From:"Begosh, Kevin" <[email protected]> To: [email protected] Sent: Tuesday, February 3, 2009 3:14:40 PM Subject: Re: Apache Tomcat Memory Pool ** Yes this does help and I am on 7.1 as well so this would help out a lot. We are having those exact issue with Tomcat crashing. Kevin Begosh, RSP Tech Ops Enterprise Business Services 301-791-3540 Phone 410-422-3623 Cell [email protected] From:Action Request System discussion list(ARSList) [mailto:[email protected]] On Behalf Of Joe DeSouza Sent: Tuesday, February 03, 2009 1:13 PM To: [email protected] Subject: Re: Apache Tomcat Memory Pool ** Thsi is more of a Tomcat setting than a 'BMC recommended' setting. The golden rule for sizing tomcat memory is to not use more than 65% to 70% of the available free memory before the tomcat service is started. This gives the server at least 30% to 35% headroom. With that in mind it is nice to have a max memory of at least around the 3 GB mark where the usage of the servers is about average. Since you are using tomcat, if you are using Mid-Tier 7.1, I would recommend to hop on the patch 006. In my experience here the earlier patches had a memory issue, that addresses OutOfMemory errors that cause Tomcat to crash which was addressed in Patch 006. Also the performance is way better as I have noticed that it takes a relatively short time for the server to build its cache after an initial restart on patch 006 (at least 5 to 10 times faster) than it was on lets say Patch 003. I haven't tried patches in between 003 and 006 Hope this helps.. Cheers Joe ________________________________ From:"Begosh, Kevin" <[email protected]> To: [email protected] Sent: Tuesday, February 3, 2009 12:53:46 PM Subject: Apache Tomcat Memory Pool ** Does anyone know what the BMC recommended or what the best settings are for the Apache Tomcat memory pool for the Mid Tier. We are windows 2003 and we have two mid tiers that are load balanced. Kevin Begosh, RSP Tech Ops Enterprise Business Services 301-791-3540 Phone 410-422-3623 Cell [email protected] _______________________________________________________________________________ UNSUBSCRIBE or access ARSlist Archives at www.arslist.org Platinum Sponsor: RMI Solutions ARSlist: "Where the Answers Are"
