[mythtv-users] mythbackend crashes every 6-7 hours

[Rob Verduijn]

Hi there,

I've spend some time awake when the folks we're sleeping.
Ran the memory stress test and guess what.......ZERO!!! ERRORS
Over one hour wasted.

The physical ram is OK.

I will perform no more hardware related tests that are based on
assumptions or gut feelings.

Sorry about that I get cranky when I do not get enough sleep.

I'm not running trunk builds.
I'm running packages from the packman repository.
http://ftp.gwdg.de/pub/linux/misc/packman/suse/11.3

Rob Verduijn


2010/10/31 Greg Oliver <oliver.greg at gmail.com>:
> On Sat, Oct 30, 2010 at 5:02 PM, Martin Moores <moores.martin at gmail.com> wrote:
>> Rather than having the downtime, if you had any RAM you could swap into the
>> box from spare or another machine, then that would help prove either way and
>> no worry of complaints from the family!
>>
>> Martin
>>
>> On 30 Oct 2010 22:58, "Rob Verduijn" <rob.verduijn at gmail.com> wrote:
>>> I'm still not convinced it's worth the hassle of setting up a stress
>>> test and risking the wrath of the family.
>>>
>>> There aren't any weird messages in the message log except "terminate
>>> called after throwing an instance of 'std::bad_alloc' "
>>> Applied google to this and I get dozens of hits about memory problems
>>> due to bad allocation of memory.....doh.....
>>> Not a single hit is about faulty hardware.
>>>
>>> Watching top for a while shows me the mythbackend process chewing up
>>> more and more memory doing nothing but waiting for a client to
>>> connect.
>>> (there were none while I watched it)
>>>
>>> So there are no weird entries except the one mentioned before.
>>> I saw Mythbackend using 2Gb of ram and while I watched I saw it
>>> increase it's memory usage to 2.1Gb
>>> Mythbackend was idle at that time, no recordings we're active, there
>>> were also no clients active.
>>>
>>> I have no indication that this should be hardware related.
>>>
>>>
>>> Rob Verduijn
>>>
>>>
>>> 2010/10/30 George Poulson <george.poulson at gmail.com>:
>>>> On 30 October 2010 20:38, Rob Verduijn <rob.verduijn at gmail.com> wrote:
>>>>
>>>>>
>>>>> Especially elaborate the reason that leads you to believe I have a
>>>>> hardware failure.
>>>>>
>>>>
>>>> Sorry.. I was replying to an earlier post and I missed the extra
>>>> information
>>>> that you posted about your mythbackend process consuming the memory,
>>>> though
>>>> I've never experienced myth 'eating' memory on this scale.
>>>> I have seen many occasions when machines that have been working well
>>>> suddenly become very unstable due to hardware faults. It's also possible
>>>> for
>>>> a "faulty-but-almost-always-unused" area of memory that may have been
>>>> unused
>>>> for some time to be brought into use due to something as simple as an
>>>> additional application being started, and thus crash the machine.
>>>> I still think it may be worth running some memory tests if you can -
>>>> presumable you have vnc or something similar for remote access? Could you
>>>> not keep the family happy by running your tests during a quiet spell?
>>>> George
>
> If you do not want to go through the effort of hooking up kvm, then I
> would recommend running it under valgrind.  At least then you will
> know if it is software related or not.
>
> I assume you are running trunk builds?  If there was no change in
> software to cause this behavior, it would be hard to not point the
> finger at the hardware..?
>
> -Greg
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>