eG Monitoring
 

Measures reported by MySQLCluConnTest

This test provides information about client connections to each node in the target MySQL Cluster database server.

Outputs of the test : One set of results for each node in the target MySQL cluster database server being monitored

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Max_conns_limit Indicates the maximum number of connections that can be opened on this node. Number  
Connection_usage Indicates the percentage utilization of the connections on this node. Percent  
Conns_create_rate Indicates the rate at which applications attempted to connect to this node during the last measurement period. Connections/Second The data transmission rate reflects the workload on the each node on the cluster database server.
Active_conns Indicates the number of currently open connections on this node. Number A high value may be indicative of connections not being closed properly by applications, or a bottleneck in the server.
Conns_aborted Indicates the number of connections that were aborted because the client terminated without closing the connection properly on this node during the last measurement period. Number  
Conns_failed Indicates the number of connection attempts to this node that failed during the last measurement period. Number A high value can indicate:

  • a configuration problem with the server/clients;

  • some malicious attack on the server;
Max_conns Indicates the maximum number of connections that were simultaneously in use on this node during the last measurement period. Number