MySQL Cluster Activity Test

This test tracks the writes, inserts, deletes, and flushes happening on each node in the target MySQL Cluster database server. Using this test, administrators can easily isolate error-prone nodes and can proactively analyze the reason behind errors noticed on the node.

Target of the test : A MySQL Cluster

Agent deploying the test : A remote agent

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

Configurable parameters for the test
Parameter Description

Test Period

How often should the test be executed.

Host

The host for which the test is to be configured.

Port

The port at which the specified host listens.

Database

Specify the name of a database on the target MySQL Cluster database server being monitored

Username and Password

The eG agent has to be configured with the credentials of a user who has server-wide Process and Select privileges on the monitored MySQL Cluster database server. To know how to create such a user, refer to Pre-requisites for Monitoring the MySQL Cluster Database Server topic.

Confirm Password

Confirm the password by retyping it here.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

Inserts

Indicates the rate at which requests to insert a row in a table of this node were received.

Inserts/Sec

 

Updates

Indicates the rate at which requests to update a row in a table of this node were received.

Updates/Sec

 

Flushes

Indicates the rate at which FLUSH commands were executed in a table of this node.

Flushes/Sec

 

Deletions

Indicates the rate at which requests to delete a row in a table of this node were received.

Deletions/Sec

 

Delayed writes

Indicates the rate at which rows are written with INSERT DELAYED in a table of this node.

Writes/Sec

 

Delayed errors

Indicates the rate at errors occurred in the rows written with INSERT DELAYED in a table of this node.

Errors/Sec

Ideally, the value of this measure should be 0.

Compare the value of this measure across nodes to figure out the node that is frequently error-prone.