Den tors 15 okt. 2026 kl 20:48 skrev Gregory Farnum <gfarnum@redhat.com>:
Heartbeating is a continuous process — it issues a new ping every 5 or 15 seconds or something. So apparently whatever queue is blocking it (switch, kernel queue, something in Ceph code) is getting a bit shorter over that duration. If you have durable and persistent issues with ping latency, the slow change is not surprising. (Note too that this is aggregating the worst reports from OSDs. If you look at the health detail you may see the source switching around. Or maybe it’s one particular NIC causing trouble and it’s always the same one.)
It is dual 25GE, and its not filled to the brim, so its not something that makes packets take 3 seconds to arrive in between. My point (if I can make some kind of analogy) is that if some student has a bad morning, it is totally reasonable that they can be a few minutes late for first class, but it would be weird if that same reason made them a few minutes late for next class and next again just a bit less late until lunch when the student finally catches up with the schedule and then makes it on time for the rest of the day. Again, I am not confused about if it would rise continuously, so in my possibly poor analogy, if the student doesn't arrive at all, then the teacher would count minutes late that would go up by one minute per minute and at the end of the class note that it was a no-show. The next teacher would start recording lateness again rising at one minute per minute passed. What I am confused about is how it can both be late in the same kind of timespan with 15 seconds in between, for minutes at a time, and most always working its way slowly downward. In my mental picture it doesn't seem to be prioritized and also not de-prioritized work either since both of those would should up differently in terms of what to say about something 3000 ms late 15 seconds ago from "now its only 2900 ms late". It could logically work out, if it is some kind of long time average for which we are seeing a decaying average of something that happened a long time ago, which makes it somewhat meaningless to keep as a warning for something that actually recovered long ago. I'd rather see it show me the current ping response time. -- May the most significant bit of your life be positive.