Thanks Aria. We will contact you off list. Its probably better if our applications person describes the problem rather than me. In general, once it gets up to a certain load of users, response goes into the crapper and the virtual server starts chewing up CPU. However, Brian can give you more detailed information from the application point of view.
Thanks everyone for your comments and tips. We are still in the data gathering phase right now, in addition to trying to recreate the problem (without needing 1000 students hitting the server that is). I'll post more specific information when I have it. We are definitely looking at it from all angles including real resources, z/VM, Linux, etc. We want to take a systematic approach to evaluating the problem and making changes. I'm sure you all know as well as I that it is likely not one "magic bullet" that fixes all, but a whole series of tweaks. Martha On Wed, 4 Sep 2013 09:12:03 -0400 Aria Bamdad said: >Martha, > >We have been using a supported version of Liferay (Liferay EE) for over 2 >years now and have not had any problems. Currently we are on IBM JRE 1.7 >and 1.6 on a dev server. We use tomcat as provided by SLES 11 SP2 and SP3. >When you say 'falls over badly', can you elaborate as to what the actual >problem is? > >By the way, I can safely say that few other vendors come close to the type >of support Liferay provides if you sign up for a support contract, both in >terms of speed and knowledge. We have been very happy with them fixing bugs >quickly and providing patches sometimes within days. > >Feel free to contact me off list if you like. > >Aria > >-----Original Message----- >From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Martha >McConaghy >Sent: Tuesday, September 03, 2013 1:35 PM >To: LINUX-390@VM.MARIST.EDU >Subject: Advice on TomCat and portal tuning > >We have embarked on a project to support our main student/faculty/staff >portal >on zLinux. It works fine under a normal workload, but falls over badly when >under a heavy load such as during class add/drop. The portal is running open >source software named LifeRay on top of TomCat on SLES 11 SP1. > >We know there is a lot of tuning that needs to be done, but there are a ton >of >variables to consider. If anyone on the list has any experience tuning this >sort of environment, i.e. Java without Websphere, we would love to talk with >you. Please drop me a note. > >Martha McConaghy >System Architect/Technical Lead >Marist College > >---------------------------------------------------------------------- >For LINUX-390 subscribe / signoff / archive access instructions, >send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or >visit >http://www.marist.edu/htbin/wlvindex?LINUX-390 >---------------------------------------------------------------------- >For more information on Linux on System z, visit >http://wiki.linuxvm.org/ > >---------------------------------------------------------------------- >For LINUX-390 subscribe / signoff / archive access instructions, >send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit >http://www.marist.edu/htbin/wlvindex?LINUX-390 >---------------------------------------------------------------------- >For more information on Linux on System z, visit >http://wiki.linuxvm.org/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
