MariaDB Galera Cluster

Extends standard server monitoring with Galera-specific metrics like flow control pauses, write conflicts, replication queue depth, and individual node cluster states.

The MariaDB Galera Cluster dashboard mirrors most sections from the MariaDB Server dashboard extending it with Galera Metrics section and the Galera Nodes table. Use this dashboard when you need Galera-specific cluster health alongside the familiar server views.

Galera Metrics

Insights into Galera Cluster health with critical metrics and node-specific status details.

Metric	Description
Flow Control Pause %	Percent of time a node is paused due to Galera flow control backpressure.
Flow Control Messages Sent	"Slow-down" signals sent per second when a node is under pressure.
Replication Queue Depth Received	Size of the receive/apply queue; growth indicates apply lag.
Write Conflicts	Certification conflicts per second (failed concurrent writes on hot rows).
Max Galera Replication Latency (s)	Maximum observed replication/EVS latency per node.
Transactions	Per-node throughput: transactions received from peers and/or replicated out.
Writeset Traffic	Bytes/s of Galera writesets per node (inbound vs outbound).

Galera Nodes

Per-node status summary with short state logic

Attribute	Description
Instance / Status	Is the server up? (Based on mariadb_up)
Accept Queries	Can this node take client traffic right now? (Based on wsrep_ready)
Local State	Where is the node in the Galera lifecycle? (Based on wsrep_local_state)
Flow Control	Is this node throttling or being throttled? (wsrep_flow_control_* rate > 0 → ON, otherwise OFF)
Cluster Status	Is the node in the Primary component? (Based on wsrep_cluster_status)
Connected	Is the node linked to the group? (Based on wsrep_connected)

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