Monitoring flow control in a Galera cluster is very important. If
you do not, you will not understand why writes may sometimes be
stalled. Percona XtraDB Cluster 5.6 provides 2 status
variables for such monitoring:
wsrep_flow_control_paused_ns. Which one should you
What is flow control?
Flow control does not exist with regular MySQL replication, but only with Galera replication. It is simply the mechanism nodes are using when they are not able to keep up with …[Read more...]