[dsc] CPU problem

[Elias Abacioglu]

no core file :( I guess the ubuntu package isn't built with debugging
symbols


2014-03-05 9:55 GMT+01:00 Elias Abacioglu <elias.rabi at gmail.com>:

> Hi Duane,
> I've attached the output from the debug run. I doubt it will show anything
> since it doesn't spike the CPU instantly. It does it after it's been
> running for some time.
> I just restarted DSC(and running in foreground so I get the output). When
> it goes to 100% CPU I will do a kill -ABRT.
> ulimit -c was 0 so I guess unlimited size of core file.
>
>
> Thanks!
> Elias
>
>
> 2014-03-04 14:53 GMT+01:00 Duane Wessels <wessels at measurement-factory.com>
> :
>
>
>> Hello Elias,
>>
>> I have two suggestions:
>>
>> 1) you can run dsc in a debugging mode.  For example:
>>
>>    $ sudo dsc -d -f /usr/local/etc/dsc/dsc.conf
>>
>>    that might help identify the problem.
>>
>> 2) second option is to send the running process an ABRT signal
>>    while it is running:
>>    $ sudo kill -ABRT dsc-pid
>>
>>   That signal should cause the dsc process to make a core dump, although
>>   sometimes you have take some extra steps to make sure the core file
>>   gets created.  Check "ulimit -c" and make sure dsc's working directory
>>   is writable.
>>
>>   When you have a core dump, and if the binary is compiled with debugging
>>   symbols, then you can use gdb to pinpoint where its getting stuck.
>>
>> DW
>>
>>
>>
>> On Tue, 25 Feb 2014, Elias Abacioglu wrote:
>>
>>  Hi all,
>>>
>>> I've joined this mailing list cause I have what I would assume to be an
>>> unusual problem.
>>> I have 5 name servers running bind 9 and with similar setup.
>>>
>>> DSC works on all of them but causes problem on the fifth.
>>> It uses 100% CPU on one core.
>>> I tried updating the entire system (apt-get update && apt-get upgrade).
>>> It
>>> did not help.
>>> DSC is installed using a configuration manager so installation is
>>> identical.
>>>
>>> On all servers it spawns two processes, these two
>>> /usr/bin/dsc -p /var/run/dsc-statistics-collector/dsc-collector_
>>> default.cfg
>>> \_ [dsc] <defunct>
>>>
>>> But on that faulty server after a short while it starts eating the CPU.
>>> And
>>> it doesn't seem to be so more DNS usage on that nameserver.
>>> The version is 201106061022-4, which is the one found in Ubuntu 12.04
>>> (precise) repos.
>>> $ cat /etc/issue
>>> Ubuntu 12.04.3 LTS \n \l
>>>
>>> How should I continue with this? Can't have one of two cores running at
>>> 100% all the time.
>>>
>>> Regards,
>>> Elias
>>> _______________________________________________
>>> dsc mailing list
>>> dsc at measurement-factory.com
>>> http://www.measurement-factory.com/mailman/listinfo/dsc
>>>
>>>
>