[mythtv-users] "Nice" recommendations

[Stuart Auchterlonie]

On 31/10/17 14:14, Ozzy Lash wrote:
> 
> 
> On Tue, Oct 31, 2017 at 5:15 AM, Stuart Auchterlonie
> <stuarta at squashedfrog.net <mailto:stuarta at squashedfrog.net>> wrote:
> 
>     On 31/10/17 06:15, Ian Evans wrote:
>     > I notice that when I run a mythvidexport.py user job moving a recording
>     > to the video section, the responsiveness of the interface grinds to a
>     > halt and the load goes north of 5.
>     >
>     > Haven't really used nice much. Any recommendations what nice level I
>     > should run it at?
>     >
> 
>     nice -19
> 
>     which is basically background task, and everything else takes priority.
> 
> 
> 
> Isn't a negative nice value giving the process a HIGHER priority?  I
> think you mean "nice 19"  correct?
> 

Nope, it's -19. It's probably clearer from the man page explanation.

-n, --adjustment=N
    add integer N to the niceness (default 10)

so the '-' doesn't mean minus, it means an option to the command

<option><value>

so --19 would be a priority boost, however only root can boost the
priority, normal users can only reduce their priority.

$ nice --19 echo fish
nice: cannot set niceness: Permission denied
fish

$ nice -19 echo fish
fish


Regards
Stuart