Range, can you elaborate on this, I don't really get it.
We want to measure CPU usage for the JBoss JVM.
How would it help if we load some class or even bytecode manipulate it?
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The problem with these approaches is tha they are OS dependent. You can use
bytecode rewriting to make the solution os independent. For example
http://jain-sip-appserver.dev.java.net
We are considering it for use in our slee project
http://mobicents.dev.java.net
Ranga.
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Regarding CPU/memory monitoring, they are not EJB-specific performance data and most
of these data are available through
SNMP interface. There are a couple of mature SNMP agents
providing such data via various MIB (e.g. net-snmp)
So we do not have to re-ivent the wheel. IMHO, the best way to do
So you mean we can poll an external (to the JVM) snmp agent running on the same box to
get the CPU/Memory info from the operating system?
The memory monitor is already implemented, but I think it may be interesting for the
cpu monitor..
You add thourgh an external dependency...
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Hello,
I'm not sure this is where I should post this, but I have found no other area where
this is applicable.
The biggest issue I see with this project when measuring Server utilization is that
JBoss does not manage thread utilization.
Correct me if I'm wrong, but I have been through the
Ignore my previous post about there not being a ThreadPool... I must have my eyes
examined I found it.
Sorry If I annoyed anyone.
Cheers
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You gave me some ideas. I think I'm going to use as a baseline the best run (in
terms of how much a thread actually waited on a timed wait and how much time it took
to execute a simple CPU bound task) and measure the difference.
Cheers
/Dimitris
a
I am thinking that it is not as important whether we detect the same CPU % as the OS.
It is more important to know whether a regular Java thread in the VM is being resumed
more or less often.
If we answer the following question positively, then we have a reason for serious
doubt:
Did the
Right, without support from the vm/os your not going to be able to monitor thread
liveness. What is important is does a monitor thread actual get sufficient time to
emit a timely notification when there is an out of control thread spinning on a single
cpu systems. Just mock up such a service
ivelin wrote : Very nice, Dimitris.
|
| I am not sure what a suitable task would be for the CPU monitoring. It is probably
not as important what the actual task is, but rather how do we measure the CPU usage.
An example method could be to remember the highest performance within a 10
Very nice, Dimitris.
I am not sure what a suitable task would be for the CPU monitoring. It is probably not
as important what the actual task is, but rather how do we measure the CPU usage. An
example method could be to remember the highest performance within a 10 (configurable)
second
ivelin wrote :
| ...
| 1) Scheduling based CPU estimate. Schedule a regular heartbeat task which will
measure the time between two runs. If the delay is over the scheduled interval for a
prolonged (configurable) time, then broadcast JMX notification.
|
| 2) Memory monitor. A similarly
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We can discuss your idea. Do you have a more detailed design document handy?
Ivelin
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Ok, started writing a short design doc.
Will come back, soon
Cheers
/Dimitris
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Hi,
I'd like to do parts of this. Although it can be solved by writing specific MBeans, I
was thinking
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