MariaDB Galera Cluster - Cert Deps Distance issue I have mariaDB Galera 10.2 Cluster running with 3 nodes; in google cloud VMs with 8 cpu ; 15Gigs Ram / node; My slave_thread setting = 24 ; currently there is no much write happening and local_receive_q_avg= 0.019481 but my Cert_deps_distance= 54 in two nodes and 0 in one node ? What does that mean ?
wsrep-cert-deps-distance

Most likely the 0 on one node was the only node being written to. So there are limited galera status changes there as it does not apply in the same was as the other nodes do.