I noticed all of diagram can’t be graphed during 08:00 to 09:00 every morning.
I tried to dumped rrd file and I got NaN value during the period.
Besides, I noticed there have MYSQL error in librenms.log , and there have “1213 Deadlock” error below during same period.
Serialization failure: 1213 Deadlock found when trying to get lock; try restarting transaction (SQL: UPDATE
Is this kind of bug for alert log update and cause rrd graph issue?