Java Monitoring on a VPC

[Vimal Shah]

jstat works nicely now James. Thank you. I will try the various options as
well.

A little more about the problem. Every 4-6 weeks the CPU util looks like:

[image: Inline image 1]


The application slows and Alerts are emailed. The application is restarted
(in this case on 10/2 at 1:00). This allows the application to return to
normal responsiveness and allows the box itself to go back to 3% CPU util.
The ideal tool would be one that would help us understand this. Can jstat
be used to investigate this? Would a call trace and heap dump be more
useful as identification to the function that was called when this error
occurred?



On Wed, Oct 9, 2013 at 3:25 PM, James Mcphee <jmcphe at gmail.com> wrote:

> For jstat, you have to be a user with permission to the process.  In this
> case, either the user the java process is running as, or root.  I use jstat
> when I want to script things to watch them on the console.
>
> For JMX, there are jvm arguments you can use to open it up to external
> hosts, provide authentication, etc.  That will depend on the server you're
> running and you should consult the documentation for that server.
>
>
> On Wed, Oct 9, 2013 at 3:19 PM, Vimal Shah <vimals at sokikom.com> wrote:
>
>> James,
>>
>> What other details can I provide?
>>
>> It does sound like JMX is the standard. When running jstat with my JAVA
>> PID
>>
>> $ jstat -gc 19326
>> Could not attach to 19326
>>
>> I don't have JMX configured. After some reading it seems that I need to
>> get a Mbeans server running. Is this what I have to do?
>>
>> http://docs.oracle.com/javase/tutorial/jmx/mbeans/standard.html
>>
>>
>> On Wed, Oct 9, 2013 at 1:15 PM, James Mcphee <jmcphe at gmail.com> wrote:
>>
>>> We'd need more details to give you much more than "Using JMX or jstat
>>> would be easiest"
>>>
>>> Example:
>>> ./jstat -gc 27104
>>>  S0C    S1C    S0U    S1U      EC       EU        OC         OU       PC
>>>     PU    YGC     YGCT    FGC    FGCT     GCT
>>> 20928.0 21312.0  0.0   4864.0 305728.0 128383.7  262656.0   223537.3
>>>  170240.0 130738.6    295    6.912  10      8.268   15.180
>>>
>>> http://docs.oracle.com/javase/1.5.0/docs/tooldocs/share/jstat.html
>>>
>>>
>>> On Wed, Oct 9, 2013 at 1:05 PM, Vimal Shah <vimals at sokikom.com> wrote:
>>>
>>>> Hello,
>>>>
>>>> Does anyone have a step by step guide to getting monitoring (heap
>>>> stack) set up of a Java app on an Amazon VPC box? The application is
>>>> smartfoxserver and it's on Ubuntu 12.04.
>>>>
>>>> I've scratched the surface on the following:
>>>>
>>>>    - https://code.google.com/p/javamelody/
>>>>    -
>>>>    http://docs.oracle.com/javase/6/docs/technotes/guides/management/jconsole.html
>>>>    - http://jamonapi.sourceforge.net/
>>>>
>>>>
>>>> Application code changes aren't within my reach at the moment. An
>>>> apt-get install of a monitoring tool on the server under question would be
>>>> ideal. If this tool can have low overhead even better.
>>>>
>>>> Thank you all in advance.
>>>>
>>>> --
>>>> Vimal (rhymes with Kimmel) Shah
>>>> Front-End / Infrastructure Engineer
>>>> Sokikom
>>>> Mobile: (480) 752-9269
>>>> Email:   vimals at sokikom.com
>>>> Web:    www.sokikom.com
>>>>
>>>> Follow us: twitter.com/sokikom <http://www.twitter.com/sokikom>
>>>> Like us: facebook.com/sokikom <http://www.facebook.com/sokikom>
>>>>
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>>>>
>>>
>>>
>>>
>>> --
>>> James McPhee
>>> jmcphe at gmail.com
>>>
>>> ---------------------------------------------------
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>>>
>>
>>
>>
>> --
>> Vimal (rhymes with Kimmel) Shah
>> Front-End / Infrastructure Engineer
>> Sokikom
>> Mobile: (480) 752-9269
>> Email:   vimals at sokikom.com
>> Web:    www.sokikom.com
>>
>> Follow us: twitter.com/sokikom <http://www.twitter.com/sokikom>
>> Like us: facebook.com/sokikom <http://www.facebook.com/sokikom>
>>
>> ---------------------------------------------------
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>> To subscribe, unsubscribe, or to change your mail settings:
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>>
>
>
>
> --
> James McPhee
> jmcphe at gmail.com
>
> ---------------------------------------------------
> PLUG-discuss mailing list - PLUG-discuss at lists.phxlinux.org
> To subscribe, unsubscribe, or to change your mail settings:
> http://lists.phxlinux.org/mailman/listinfo/plug-discuss
>



-- 
Vimal (rhymes with Kimmel) Shah
Front-End / Infrastructure Engineer
Sokikom
Mobile: (480) 752-9269
Email:   vimals at sokikom.com
Web:    www.sokikom.com

Follow us: twitter.com/sokikom <http://www.twitter.com/sokikom>
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