[mythtv-users] FEs have high CPU and memory usage
John Finlay
finlay at moeraki.com
Tue Apr 22 06:12:23 UTC 2014
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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