--- Comment #2 from ***@heuristicsystems.com.au ---
(In reply to Fabian Keil from comment #1)
Thanks Fabian, you're quite right. And the example that you provided did have
the same successful outcome for me. Unfortunately I'm trying to elevate the
priority of a database over all other activies. So setting any priority less
than 0 doesn't work, whether I use
JAIL=b2 in my base or for you, (hint to cut/paste) ;)
nice -n -1 jexec -U root $JAIL ps -l
jexec -U root $JAIL nice -n -1 ps -l
The NI and PRI values remain 0 and 72 respectively, that is default (no nice)
value. I kinda get it that within the jail context the priority can't be
elevated, but with executing the process from within the context of the base
system should work.
This successful result also suggests that elevating via nice should work.
# rtprio 0 jexec -U root b2 ps -l
UID PID PPID CPU PRI NI VSZ RSS MWCHAN STAT TT TIME COMMAND
0 97468 90697 0 -52 0 21140 2276 - R+J 7 0:00.00 ps -l
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