Default Parameters for MySQLCluInLctest

InnoDB implements standard row-level locking where there are two types of locks, shared ( S ) locks and exclusive ( X ) locks. A shared ( S ) lock permits the transaction that holds the lock to read a row in a table. An exclusive ( X ) lock permits the transaction that holds the lock to update or delete a row.

The locking activity of an InnoDB table in the database server must be monitored carefully because an application holding a specific lock for a long time could cause a number of other transactions relying on the same lock to fail. The MySQLCluInLctest monitors the locking activity on the InnoDB tables in each node of the target cluster database server .

This page depicts the default parameters that need to be configured for the MySQLCluInLctest.

• The TEST PERIOD list box helps the user to decide how often this test needs to be executed.

• Specify the name of a database on the target MySQL Cluster database server being monitored in the DATABASE NAME text box.

• To monitor MySQL Cluster database server, the eG agent should be configured with the credentials of a user with 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. Specify the name and password of such a user in the USER NAME and PASSWORD text boxes.

• Confirm the Password by retyping it in the CONFIRM PASSWORD text box.

• Once the necessary values have been provided, clicking on the UPDATE button will register the changes made.

When changing default configurations of tests, the values with “$” indicate variables that will be replaced by the eG system according to the specific server being managed - for instance, $hostName is the host/nickname of the target host, $port is the port number of the server being monitored. E.g., for a server xyz:80, $hostName will be changed automatically by the eG manager to “xyz*” and $port will be changed to “80” when configuring a test.