From time to time we see at Galera Cluster customer engagements the following, for me scary, warning in the MySQL error log:
[Warning] WSREP: last inactive check more than PT1.5S ago (PT7.06159S), skipping check
We mostly see this in VMware set-ups. Some further enquiry with the Galera developers did not give a satisfying answer:
This can be seen on bare metal as well - with poorly configured mysqld, O/S, or simply being overloaded. All it means is that this thread could not get CPU time for 7.1 seconds. …
