Re: Something is killing my CPU

OK, this looks like one of the culprits, but I don’t know what it means.


  1.  At 2pm you can see CPU clearly jump:
     *   [cid:[email protected]]
  2.  It looks to be this thread:
     *   [cid:[email protected]]
  3.  If I expand the thread all the way down (and boy does it go a long way) I finally get here:
     *   [cid:[email protected]]

Anyone know what this means?!

Gavin
From: Gavin Hill <[email protected]>
Sent: Tuesday, 09 October 2018 13:32
To: General OpenNMS Discussion <[email protected]>
Subject: Re: [opennms-discuss] Something is killing my CPU

Thanks Dino, I have VisualVM up and running and a JMX connection to the OpenNMS box active.

Now what am I looking at/for?!  I have no real clue as to how to spot the culprit?

Gavin


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Gavin Hill  |  Director
m: +27 83 601 8181<tel:+27%2083%20601%208181>
t: +27 10 020 5959<tel:+27%2010%20020%205959>
  [cid:[email protected]] <mailto:%28%21Email%21%29> [cid:[email protected]] <https://www.linkedin.com/company/highpeak-pty-ltd/> [cid:[email protected]] <skype:%28%21Email%21%29> [cid:[email protected]] <https://www.highpeak.co.za/>


[cid:[email protected]]

From: Dino Yancey <[email protected]<mailto:[email protected]>>
Sent: Monday, 08 October 2018 20:28
To: General OpenNMS Discussion <[email protected]<mailto:[email protected]>>
Subject: Re: [opennms-discuss] Something is killing my CPU

I'd recommend watching the JVM with something like VisualVM ( https://visualvm.github.io/ ) to see which subsystem or thread is spinning out.  Probably easier to follow than a stack trace.

Dino

-- 
Gavin Hill  |  Director
m: +27 83 601 8181
t: +27 10 020 5959
   

 
 
On Mon, Oct 8, 2018 at 12:01 PM Gavin Hill <[email protected]<mailto:[email protected]>> wrote:
How do I identify which OpenNMS (22.0.4) process is consuming all of my CPU time?  I have a 4-core machine that runs fine after a restart but over time, CPU just grows until it maxes out.

[cid:[email protected]]

[cid:[email protected]]

Any thoughts on how I identify what is doing this?  I look in htop and it shows it’s one of the OpenNMS Java threads, but I don’t know how to find out which.  Restarting OpenNMS every few days is not an option for me.

--
Gavin Hill  |  Director
m: +27 83 601 8181<tel:+27%2083%20601%208181>
t: +27 10 020 5959<tel:+27%2010%20020%205959>
  [cid:uIntJudOv0WWT9gK1Gd6SgHighpeak_email_jpg] <mailto:%28%21Email%21%29> [cid:eG9ti278aE6WLBs3ol32MgHighpeak_linkedin_jpg] <https://www.linkedin.com/company/highpeak-pty-ltd/> [cid:VR7Az4S9TkOoA1vXSpYxyAHighpeak_skype_jpg] [cid:UNL71Mui90OJgeHgbShQDQHighpeak_web_jpg] <https://www.highpeak.co.za/>

[cid:lKM45Y5pE0GFg4Zv0wQ4fAHPLogoForSignature_jpg]
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