[mythtv-users] MythFrontend out of memory problem

[Kenneth Emerson]

Thanking each of you for all the input, especially the info on how Linux
uses swap space; I had no idea.

Theme info: I'm using a modified version of Robert Siebert's Blue Abstract
(I think it was version 10 when I cloned it).  I made minor modifications
mostly around display season/episode data.

MythWelcome is not used. I have installed mythmusic and mythgallery.  I
believe mythweb is installed but I don't use it.

It appears that the only time the frontend dies is when killed by the OOM
service (or by me for other purposes).  That's all that shows up in the
kern.log files which go back to 16 April 2022.

The output from dpkg -l | grep -i myth:
ii  libmyth
2:32.0+fixes.202205111848.26079f815a~ubuntu20.04.1 amd64        Common
library code for MythTV and add-on modules (runtime)
ii  libmyth-python
 2:32.0+fixes.202205111848.26079f815a~ubuntu20.04.1 all          Python
library to access some MythTV features
ii  libmythes-1.2-0:amd64                 2:1.2.4-3build1
                 amd64        simple thesaurus library
ii  libmythtv-perl
 2:32.0+fixes.202205111848.26079f815a~ubuntu20.04.1 all          Perl
library to access some MythTV features
ii  mythes-en-us                          1:6.4.3-1
                 all          English (USA) Thesaurus for LibreOffice
ii  mythmusic
2:32.0+fixes.202205111848.26079f815a~ubuntu20.04.1 amd64        Music
add-on module for MythTV
ii  mythtv
 2:32.0+fixes.202205111848.26079f815a~ubuntu20.04.1 all          Personal
video recorder application (client and server)
ii  mythtv-backend
 2:32.0+fixes.202205111848.26079f815a~ubuntu20.04.1 amd64        Personal
video recorder application (server)
ii  mythtv-backend-master
2:32.0+fixes.202205111848.26079f815a~ubuntu20.04.1 all          Metapackage
to setup and configure a "Master Backend" profile of MythTV
ii  mythtv-common
2:32.0+fixes.202205111848.26079f815a~ubuntu20.04.1 amd64        Personal
video recorder application (common data)
ii  mythtv-database
2:32.0+fixes.202205111848.26079f815a~ubuntu20.04.1 all          Personal
video recorder application (database)
ii  mythtv-frontend
2:32.0+fixes.202205111848.26079f815a~ubuntu20.04.1 amd64        Personal
video recorder application (client)
ii  mythtv-transcode-utils
 2:32.0+fixes.202205111848.26079f815a~ubuntu20.04.1 amd64        Utilities
used for transcoding MythTV tasks
ii  mythweb
2:32.0+fixes.202205111848.26079f815a~ubuntu20.04.1 all          Web
interface add-on module for MythTV
ii  php-mythtv
 2:32.0+fixes.202205111848.26079f815a~ubuntu20.04.1 all          PHP
Bindings for MythTV

Thanks again for your time and input.

Regards,

Ken Emerson

On Fri, May 20, 2022 at 1:06 PM Mr Roooster <mrrooster at gmail.com> wrote:

> On Mon, 11 Apr 2022 at 06:54, Stephen Worthington
> <stephen_agent at jsw.gen.nz> wrote:
> >
> >
> > It does look like the swap space is filling up though - I would
> > suggest increasing that to 8 Gibytes.  But it is currently using
> > 798096 kiB, which is under half full so it is not obvious that it will
> > run out of swap.
> >
> Linux will in most default configurations use swap if it's available,
> by default it will attempt to swap out unused pages to maximise the
> amount of disk cache available, especially in an IO heavy workload
> like Myth.
>
> You will probably find if you increase it it will fill further
> (although with only 8GB main memory the amount it could pro-activly
> swap out would be less).
>
> Whilst there seems to be a memory issue here, using swap doesn't
> necesseraly mean you're running out of memory.
>
> Cheers
>
> Ian
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