We typically suggest our customers to use our MySQL/Galera Cluster my.cnf configuration template to avoid MySQL configuration and performance problems.
And we are paranoid as well. Thus we enable all useful logging:
wsrep_log_conflicts = 1
But this has also some consequences of more visibility…
If you monitor carefully your Galera Cluster for example with the FromDual Performance Monitor for MySQL and MariaDB, you might probably see some strange values increasing from time to time:
mysql< SHOW …
