[mythtv-users] backed seems to die regularly but nothing in log

Ben Edwards list4me2 at googlemail.com
Mon Jan 5 17:47:00 UTC 2009


2008/12/31 Nick Morrott <knowledgejunkie at gmail.com>:
> On 31/12/2008, Ben Edwards <list4me2 at googlemail.com> wrote:
>> 2008/12/30 Brad DerManouelian <myth at dermanouelian.com>:
>> > On Dec 30, 2008, at 5:09 AM, Ben Edwards wrote:
>>  >> Are there any other log files I should look at?  Is there a way on
>>  >> increasing the logging?  Any other ideas?
>>  >
>>  > mythbackend -v all
>>
>>
>> Thanks. Found this but it killed performance to the extent the box was
>>  unusable (it is a 3GHz hyper-threaded Intel).  I have been playing
>>  around with logging options.  I am getting the impression that some of
>>  the logging options are expensive for other reasons than they write a
>>  lot to the log file (i.e. there internals kill performance).  Any
>>  pointers on the ones to be avoided world be good.
>
> Try 'mythbackend -v most'
>
> This disables database query logging and timestamping which can add
> overhead, but the former may be useful if it is a particular query
> which is causing the problem.
>
> Which capture card(s) are you using?
>
> I'd also recommend thinking about running memtest to check your system
> memory, lmsensors to monitor your CPU temps, and using SMART to
> monitor your drive health. Looking in the syslog whenever the
> mythbackend process dies may also reveal extra information.

Thanks for this.  I turned the CPU fan up a bit and all is well.  I
did not realise overheating could cause individual processes to die, I
though it made the whole system fall over.

Regards,
Ben

> Did you reinstall from scratch after replacing the faulty hardware components?
>
> Nick
>
> --
> Nick Morrott
>
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