re: Adding nice to an rc.d script

[matthew green <mrg%eterna.com.au@localhost>]

> On 8/27/2011 19:14, matthew green wrote:
> >> I'm trying to figure out how I can add a nice command to daemons started
> >> by rc.d so that I can adjust system performance a little bit.
> >>
> >> Specifically I want to start by raising ntpd's priority to -5.  The
> >> built in priority command line optiosn of ntpd (-N or -P -5) don't seem
> >> to be working when I add them to the rc_flags variable in the precmd
> >> function.  Top says priority is still zero.  Manually running ntpd using
> >> nice -5 does work so I'm trying to incorporate this into the startup
> >> script somehow.
> >
> > you should just be able to set ntpd_flags="-N" or so.  look at the
> > stuff in /etc/defaults/rc.conf.  you may also be interested in
> > ntpd_chrootdir, for the paranoid.
> >
> > for real hacking, you can re-set things in /etc/rc.conf.d/ntpd and
> > have almost full control...
> 
> I did try to put just -N on the flags but it doesn't work.  I can see in 
> top that ntpd is not running at higher priority as if the rc_flags were 
> being ignored entirely.
> 
> The current setting is:
> 
> rc_flags="-N -u ntpd:ntpd -i ${ntpd_chrootdir} $rc_flags"
> 
> I added the -N, the rest was already there from the install.
> 
> Unless this isn't supposed to be called rc_flags.

note that /etc/rc.d/ntpd is not /etc/rc.conf or /etc/rc.conf.d/ntpd :-)

in /etc/rc.conf you should have

        ntpd=YES
        ntpd_flags="-N"

and that should be all.  you shouldn't have to edit /etc/rc.d/ntpd,
and if you do, usually you can put that into /etc/rc.conf.d/ntpd.

i've never had to set "rc_flags" manually.


.mrg.