[Xastir] NTP bug causing high CPU load (Linux, maybe other Unices)

[Curt, WE7U]

On Sun, 1 Jul 2012, Curt, WE7U wrote:

> I was experiencing VERY high CPU load, mostly system CPU usage, from my 
> mythtvbackend daemon.  It started yesterday or perhaps even the day before. 
> Firefox was also causing very high CPU load but only for 30-45 seconds on a 
> periodic basis.  Mythtvbackend's CPU usage was continous, causing a CPU load 
> of 20 - 25!  That makes the system somewhat unresponsive.
>
> The fix turned out to be killing/restarting NTPD.  It seems a leap-second was 
> added recently which threw NTP for a loop.  Others may be experiencing 
> similar. Kill/restart that daemon.  It's a hard one to track down from system 
> monitoring.  I found the root cause via some Google searches this morning.

Reading more about it, this seems to be the recommended simplest fix, rather than rebooting:

     /etc/init.d/ntp stop
     ntpdate 0.us.pool.ntp.org
     /etc/init.d/ntp start

I may have to VPN into work to see how my servers are getting along there.

-- 
Curt, WE7U.        http://www.eskimo.com/~archer
The world DOES revolve around me:  I picked the coordinate system!"