[mythtv-users] using ionice on commflagging
Brad DerManouelian
myth at dermanouelian.com
Wed Aug 13 17:53:37 UTC 2008
On Aug 13, 2008, at 10:46 AM, Jerome Yuzyk wrote:
> Is anyone using ionice for commflagging? I Googled and read some
> discussion
> of it but nothing unequivocal enough to keep me from asking the
> list. My TV
> box seems to struggle when I watch a recorded program while others are
> commflagging, especially during the watermark-finding phase at the
> beginning
> of flagging, and when more than one commflag job is running. I only
> hit about
> 50% CPU (already niced-d) during that, but I think it's disk
> priority that's
> getting me - my machine has a single consumer-grade PATA IDE drive
> that I
> have hdparm-ed for best performance. I get pauses in playback and
> skip-ahead
> as the commflag seems to suck up disk attention, even though my CPU
> still has
> headroom. Even with only 1 job running I can tell when it's in the
> initial
> phase.
There's a setting in mythtv-setup for how much processor to use when
running jobs. I believe they are named simply "low, medium, high" but
they basically throttle back the user job processes. Try setting yours
lower so you don't have to worry about it again.
-Brad
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