[mythtv-users] Shows Chopped Up and Long Queue of Comm Flag / Metadata Jobs
Michael T. Dean
mtdean at thirdcontact.com
Tue Aug 6 16:45:27 UTC 2013
On 08/06/2013 12:25 PM, Gary Buhrmaster wrote:
> On Tue, Aug 6, 2013 at 2:36 PM, George Galt wrote:
> ....
>> In defense of process monitors, I run one not because myth is unreliable,
>> but because it is so reliable that it may take several days or more before I
>> notice it isn't running -- by which time I've missed a few of my wife's
>> favorite programs. Since I don't watch TV every night (or sometimes for
>> more than a week, even when home), I can't otherwise monitor the system. Do
>> you have any other suggestions if a process monitor isn't the preferred
>> strategy?
> Monitoring is not (itself) a bad thing.
But how you monitor--and how you interpret the tests the monitor
performs--is very important. In the past, there were monit-based
monitoring scripts (along with other polling status scripts/widgets/...)
that (together) hammered our backend status port in what basically
amounted to a denial-of-service attack (because the little server we
have wasn't designed for such heavy usage), and it affected parts of
MythTV that were trying to use the backend services, and in some cases
caused such a slow down that the monitoring script thought mythbackend
had hung, so it would kill mythbackend and restart it. We may do
better, now, but I think you can still quite easily cause similar
problems, especially when running these status scripts/widgets or
whatever, along with the monitors.
> However, what you do about
> a failure detection is important.
Definitely true, too.
That said, I have nothing against monitoring, when done properly, but I
haven't found a need for it on my MythTV systems. I prefer to
concentrate on making my systems as rock-solid stable as possible and
skimp on the monitoring. That said, you'll probably see some "official"
monitoring for MythTV in the future (and it's likely I'll be the one
putting it--or at least the part that enables it--in place, even though
I haven't needed it).
Mike
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