[dsc] CPU problem

Duane Wessels wessels at measurement-factory.com
Tue Mar 4 13:53:11 UTC 2014

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.


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
> _______________________________________________
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> dsc at measurement-factory.com
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