[mythtv-users] FEs have high CPU and memory usage

[John Finlay]

On 4/21/2014 10:41 PM, Stephen P. Villano wrote:
>
> On 4/22/14, 12:16 AM, Karl Newman wrote:
>> On Mon, Apr 21, 2014 at 7:27 PM, John Finlay <finlay at moeraki.com 
>> <mailto:finlay at moeraki.com>> wrote:
>>
>>     On 4/21/2014 5:23 PM, Stephen P. Villano wrote:
>>
>>         On 4/21/14, 8:22 PM, John Finlay wrote:
>>
>>             On 4/21/2014 3:47 PM, Stephen P. Villano wrote:
>>
>>                 On 4/21/14, 5:50 PM, John Finlay wrote:
>>
>>                     On 4/21/2014 2:26 PM, Mark Perkins wrote:
>>
>>                             On 22 Apr 2014, at 4:48 am, "John Finlay"
>>                             <finlay at moeraki.com
>>                             <mailto:finlay at moeraki.com>> wrote:
>>
>>                             I have three FEs with 2GB that slowly
>>                             over the course of a week or
>>                             so use use up all the memory and
>>                             eventually crash I think may be due
>>                             to running out of swap. The amount of
>>                             memory usage seems to be
>>                             related to the duty cycle of the FE i.e.
>>                             the more that the FE is
>>                             used the faster it uses up memory.
>>
>>                             These systems are all running Mythbuntu
>>                             12.04 with fixes/0.27. The
>>                             CPU usage also seems to be high on these
>>                             systems when they are idle
>>                             30%-72%. I don't see anything in the logs
>>                             that indicates what's
>>                             causing the apparently high CPU and
>>                             memory usage but I probably need
>>                             to run with different logging options.
>>
>>                             Is this level of CPU and memory usage
>>                             normal? What would be a good
>>                             approach to determining why these systems
>>                             are using so many
>>                             resources when idle?
>>
>>                             john
>>                             _______________________________________________
>>
>>                         My main FE runs 24/7 and on idle sits at
>>                         about 1-2% CPU usage. It has
>>                         4Gb memory but is only using 1.7Gb at the moment.
>>
>>                         Run 'top' from a command prompt to see what
>>                         your memory usage is, it
>>                         will also show you what program(s) are using
>>                         your CPU, and work from
>>                         there.
>>
>>                     I forgot to mention that I am using top to see
>>                     what the CPU and memory
>>                     usage is. I also forgot to mention that
>>                     mythfrontend.real is the
>>                     process that is using 30+% of the CPU and 30%-72%
>>                     of the memory which
>>                     seems unexpectedly high for idle usage.
>>
>>                     John
>>                     _______________________________________________
>>
>>                 I have an FE playing on a notebook computer. It's
>>                 currently playing a
>>                 movie as well.
>>                    PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>>                 20   0 3424m 535m  56m R   56 26.9 517:12.52
>>                 mythfrontend.re <http://mythfrontend.re>
>>
>>                 On my atom netbook, which is idle:
>>                 20   0  585492  99916  40200 S   6.3  9.9 109:33.51
>>                 mythfrontend.re <http://mythfrontend.re>
>>
>>                 I'd check top and even try htop to see what is
>>                 chewing up resources.
>>                 Myth doesn't use up *that* much horsepower.
>>
>>
>>             Unfortunately mythfrontend.real seems to be the culprit
>>             on all three FEs.
>>             _______________________________________________
>>
>>         That's *really* strange. What distro are you on? What
>>         hardware are you
>>         running on? What else is installed? Which version of Myth are
>>         you running?
>>
>>
>>     All are running Mythbuntu 12.04 with fixes/0.27. Two are Nvidia
>>     ION based systems and the third is an AMD dual core with an
>>     Nvidia 210.
>>     These are dedicated to Mythtv so I haven't installed anything
>>     beyond the basic distro and the Nvidia driver.
>>
>>     If I restart mythfrontend it initially runs with about 2% CPU and
>>     13% memory when idle. When I play a recording it runs at 18% CPU
>>     and 20% memory. While browsing the recordings the memory usage
>>     rises to 40% which I presume is the result of loading all the
>>     coverart and fanart images.
>>
>>
>> I know nothing about mythbuntu, sorry, but any chance you're using 32 
>> bit? 64 bit is more widely used and thus better tested these days.
>>
>> Karl
>>
>>
>> _______________________________________________
>>
> Is there anything amiss in the logs? I'm running both 64 bit and 32 
> bit, but don't have Nvidia cards. Not seeing anything here at all like 
> that.
>
The logs don't appear to have any serious errors - just a few decoding 
errors due to OTA glitches.

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