- Jboss performance - not using all available 2007-06-11 - By jamesdonnelly256
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Hi,
We have a new server with 8 cpus and 12gb of ram. We can't get Jboss to
exploit the CPU resources available, and we're not sure where the bottleneck is
.
JBoss 4.0.5 resides on the main server, with MySql 5 running on a separate box,
connected via a dedicated private gigabit ethernet. We're using Java 5.
Requests to the application get appended to a JMS queue running against the
Mysql 5 server mentioned above.
Once the queue is populated, a message driven bean picks up from it to action
the requests.
The CPU usage never goes beyond 40-50% of one CPU when Jboss is processing the
queue.
The database server is practically idling during this time, as it has a raid 10
array of very fast disks and 4 CPU's. The network traffic between JBoss and
Mysql is minimal, so that isn't the bottleneck either.
I have tested a small multi-threaded counting program, which proves that the
JVM is more than capable of exploiting all 8 CPU's at 100%
We've adjusted most parameters we can think of to get JBoss to go faster, but
nothing makes much of a difference, including connection pool settings, number
of concurrent mdb's, thread pool settings.
It's using 2gb of Xms/Xmx (this is the maximum for one JVM right?)
If anyone has any pointers towards where to look for a bottleneck it would be
very helpful.
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