Re: [ovirt-devel] Engine's jvm stats via jmx and metrics
----- Original Message -----
From: "Piotr Kliczewski"
<piotr.kliczewski(a)gmail.com>
To: devel(a)ovirt.org
Sent: Friday, February 6, 2015 3:53:54 PM
Subject: [ovirt-devel] Engine's jvm stats via jmx and metrics
Hi,
During my work I found myself in situation when I realized that I have
no clue what engine or engine's jvm is doing. I wanted to use visualvm
[1] to monitor engine's jvm. There are two ways to monitor jvm. One of
them is by using jstatd which is limited and the second one is jmx. I
found a blog [2] which helped me to understand how to connect to the
engine.
In order to connect you need to run visualvm using attached script.
Please modify JBOSS_HOME. Once visualvm is up and running you can
click "Add jmx connection...". In connection text box please enter
(assuming that your iptables allows 8706):
service:jmx:remoting-jmx://<engine_ip>:8706
and click OK. Now you can understand what is going on with engine's jvm.
I am able see jvm level information but I still have no clue how well
high level engine commands are running. I have been looking for a
while how to integrate Metrics [3] with the engine to understand how
engine behaves over time.
I wonder if there is anyone except me interested in understanding how
well engine is running.
Thanks,
Piotr
a. I think it is important
b. I would like to add that with Widfly + Java EE 7, and the introduction of managed
java.util.concurrent I think we should consider to move our threading infra to managed
java.util.concurrent (once we use widlfly in the project) and then you will be able to
monitor threads as well.
I can think of an interim solution for now until we do.
c. JMX is great, but what about the event notifier and the work done on SNMP traps? why
not utilize this furthermore? Or do you see this as completely two different things and
two supplementary tools?
Cheers,
Yair
[1] http://visualvm.java.net/
[2]
http://blog.akquinet.de/2012/11/01/connecting-visualvm-with-a-remote-jbos...
[3] https://github.com/dropwizard/metrics
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