I have implemented 3 nodes Galera cluster successfully but I can observe high load CPU on main node (I begun create cluster from it) every 30-40 sec. Also there is no big IO on three nodes and no any network latency. I have configuration: 2 Ubuntu server 16 and one Ubuntu server 18. Also I use MariaDB 10.2 and Galera 3.
Have you ever had situation like this and what I need to investigate to determine origin of problem?
Thanks in advance.
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