> Le 14 sept. 2018 à 10:50, Sean Austin Critica <sean.crit...@gmail.com> a > écrit : > > Hello, > > > I'm new to configuring NTP, and am having a bit of trouble figuring out why > there are regular spike_detect messages on my syslog. > > I already checked the connection to the NTP server and it is stable with no > packet drops. > Additionally, that same NTP server is used by another machine on the same > network and it is synchronizing fine. So it seems isolated to this > particular machine. > > > I find one particular sequence curious. From 17:30 to 18:53, there was a > positive spike, followed by a negative spike, followed by a positive spike > interleaved with clock_sync. > Can you give me some hints regarding what may be causing this?
> <snip > kernel 0.059 PPM > Jun 5 14:50:21 info localhost ntpd[13659]: 0.0.0.0 c615 05 clock_sync > Jun 5 15:03:36 info localhost ntpd[13659]: 0.0.0.0 0618 08 no_sys_peer I think that it is probably your servers clock. NTP is unable to decide if a potential peer is stable enough. > Jun 5 15:07:55 info localhost ntpd[13659]: 0.0.0.0 0613 03 spike_detect > +0.269228 s > Jun 5 15:16:37 info localhost ntpd[13659]: 0.0.0.0 061c 0c clock_step > +0.303049 s +64 PPM if my sums are OK > Jun 5 15:16:37 info localhost ntpd[13659]: 0.0.0.0 0614 04 freq_mode > Jun 5 15:16:38 info localhost ntpd[13659]: 0.0.0.0 c618 08 no_sys_peer > Jun 5 15:31:55 info localhost ntpd[13659]: 0.0.0.0 c612 02 freq_set > kernel -186.040 PPM Now -ve This is anomalous . Not yet outside NTPs limit of 500ppm but modern hardware is usually much better. Maybe your server is frequency shifting . Check your BIOS settings . Are you using VMWARE or something like it. If it is not configured correctly virtual systems can get duff clock states. < snip rest > > > > Regards, > Sean Critica > _______________________________________________ > questions mailing list > questions@lists.ntp.org > http://lists.ntp.org/listinfo/questions People have only as much liberty as they have the intelligence to want and the courage to take. Emma Goldman _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
