This is not an official answer, ok... just my opinion! ;-)
I have seen people saying that JVM 1.5 is light years ahead of JVM 1.4.1 because the GC options you could use.
Ah... You're english is fine and you are in the wrong place to say sorry. Here in this forum everybody has a bad (or bag) English :-D lol
Our benchmarks allways were about 30% better when using one of the JRockit VMs instead of the corresponding Sun VM (with just a few performance tweaks) ... unfortunately there seem to be some problems with the 1.5VM and JBoss.
Okok ... now don't flame me for this comment. It was just a thing we mesured.
I am using sun jdk 1.4.2 along with JBoss 3.2.3. can you suggest the best vm that could be used with this version of jboss so that performance can be improved.
Tried jdk1.5 vm with JBoss 3.2.3 At startup its giving the following exception.
15:55:12,690 INFO [Server] Starting General Purpose Architecture (GPA)...
Failed to boot JBoss:
What could be the reason for this ?
Based on our experience, JRockit is faster than the Sun JVMs but it contains also way more bugs. We chose a Sun JVM (the 1.4.2 one) because stability is more important for our business.