Hi! JVM/GC-problems ... we also had to fight with this on the LiveServer/ DeliveryServer-side. Primary it´s a J2EE-problem. But you first buy the DeliveryServer and do not think much about the infrastructure. J2EE sound´s good and stable. A established plattform, where everyone (???) knows how to run software. This problem is not specific to DeliveryServer. I talked with a co- worker responsible for our fat IBM WebSphereApplication-Server and other co-workers responsible for other J2EE based third-party- software. You need to analyse the applications needs and tune GC according to this. I have hope, that Java7 with the new default GarbageCollector "G1" brings a better default-behavior. Our last problems were frequent Full GC´s on our new DS 10.1 serving our corporate intranet. During Full GC´s the server stop´s all threads until GC is finished. Full GC´s on a big JVM can take real long time. (>10 sec)
The following options help you to find out, what´s going on: -verbose:gc -XX:+PrintGCTimeStamps -XX:+PrintGCDetails In our case we were runnig out of space in the Permanent Generation: 2418057.745: [Full GC [PSYoungGen: 1283008K->504057K(1340544K)] [PSOldGen: 2796183K->2796183K(2796224K)] 4079191K->3300240K(4136768K) [PSPermGen: 118736K->118736K(118784K)], 14.8017860 secs] [Times: user=14.77 sys=0.01, real=14.80 secs] 2418273.758: [Full GC [PSYoungGen: 1283008K->489063K(1340544K)] [PSOldGen: 2796183K->2796183K(2796224K)] 4079191K->3285246K(4136768K) [PSPermGen: 118745K->118745K(118784K)], 13.6654052 secs] [Times: user=13.64 sys=0.02, real=13.67 secs] 2418503.511: [Full GC [PSYoungGen: 1283008K->410719K(1340544K)] [PSOldGen: 2796183K->2796181K(2796224K)] 4079191K->3206901K(4136768K) [PSPermGen: 118753K->118721K(118784K)], 16.8217989 secs] [Times: user=16.78 sys=0.00, real=16.82 secs] 2418872.413: [Full GC [PSYoungGen: 1283008K->464162K(1340544K)] [PSOldGen: 2796181K->2796181K(2796224K)] 4079189K->3260344K(4136768K) [PSPermGen: 118732K->118732K(118784K)], 14.3326230 secs] [Times: user=14.33 sys=0.00, real=14.31 secs] 2419180.272: [Full GC [PSYoungGen: 1283008K->459540K(1340544K)] [PSOldGen: 2796181K->2796181K(2796224K)] 4079189K->3255721K(4136768K) [PSPermGen: 118734K->118734K(118784K)], 14.9122777 secs] [Times: user=14.86 sys=0.00, real=14.91 secs] We fixed this via increasing the PermGen from 128m to 192m. Christoph -- You received this message because you are subscribed to the Google Groups "RedDot CMS Users" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/reddot-cms-users?hl=en.
