Réf. : RE: Réf. : Tracking cpu usage on application instances with JOnAS

Hello,

You have to identify the thread id with high cpu usage. (use for example
Process Explorer,
http://technet.microsoft.com/fr-fr/sysinternals/bb896653.aspx)
then examine the corresponding stack (using Process explorer or thread
dump).

Regards,


Pascale





|---------+----------------------------------->
|         |           Anthony BOUQUET         |
|         |           <Anthony-BOUQUET@cabinet|
|         |           -logic.com>             |
|         |                                   |
|         |           03/08/2010 10:02        |
|         |           Veuillez répondre à     |
|         |           jonas                   |
|         |                                   |
|---------+----------------------------------->
  >-------------------------------------------------------------------------------------------------------------------------------|
  |                                                                                                                               |
  |        Pour :   "[email protected]" <[email protected]>                                                                               |
  |        cc :                                                                                                                   |
  |        Objet :  [jonas] RE: Réf. : Tracking cpu usage on application  instances with JOnAS                                    |
  >-------------------------------------------------------------------------------------------------------------------------------|



Sorry for the missing informations,

JOnAS        :4.10.3
JDK          :1.5 Sun
OS           :Windows server 2003

I didn't know that java profilers could track cpu usage, in fact I used
this only for memory usage to catch a snapshot of a memory.
I will look in this direction, thanks

Anthony BOUQUET

LOGIC
47-49 rue Gutenberg
42100 SAINT-ETIENNE




-----Message d'origine-----
De : [email protected] [mailto:[email protected]]
Envoyé : mardi 3 août 2010 09:49
À : [email protected]
Objet : [jonas] Réf. : Tracking cpu usage on application instances with
JOnAS



Hello Anthony,

Could you specify yours:
- jonas version ?
- JVM version (and type: Sun, IBM, Jrockit) ?
- OS ?

Sincerely,



Pascale Bézard
Tél: 08 20 08 2000
Bull Support Logiciel


Visitez notre site http://www.bull.com/fr/services/support-logiciel !


Créez et suivez vos dossiers sur http://support.bull.com


Bull, Architect of an Open World TM


|---------+----------------------------------->
|         |           Anthony BOUQUET         |
|         |           <Anthony-BOUQUET@cabinet|
|         |           -logic.com>             |
|         |                                   |
|         |           03/08/2010 09:23        |
|         |           Veuillez répondre à     |
|         |           jonas                   |
|         |                                   |
|---------+----------------------------------->
  >
-------------------------------------------------------------------------------------------------------------------------------|

  |
|
  |        Pour :   "[email protected]" <[email protected]>
|
  |        cc :
|
  |        Objet :  [jonas] Tracking cpu usage on application instances
with JOnAS                                                |
  >
-------------------------------------------------------------------------------------------------------------------------------|




Hello JOnAS users,

We have a JOnAS instance running some EAR, WAR applications (about 10-15)
and we noticed that Jonas JVM wastes 50% cpu. (100% on one core on a
dual-core)
We know that's probably because of one of our application but there is no
way to track down the application which spends too much CPU.
Is there a tool (provided by JOnAS or not) which can help us to track this
?

Thanks,

Cordialement,

Anthony BOUQUET

LOGIC
47-49 rue Gutenberg
42100 SAINT-ETIENNE
(Embedded image moved to file: pic05021.jpg)