Configuration of CassLngRnQryTest

This test tracks the currently executing queries on a Cassandra database node and determines the number of queries that have been running for a long time. Using this test, resource-intensive queries to a database can be quickly isolated.

The default parameters associated with this test are as follows:

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

• Specify the IP address of the host for which the test is being configured.

• Specify the PORT at which the HOST listens. The default value is 9042.

• Specify the name of the CQL USER with the following privileges in this text box:

  SELECT privilege on the system_traces.sessions table
  SELECT privilege on the system.peer_events table

• Specify the password corresponding to the CQL User in CQL PASSWORD text box.

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

• Specify the ELAPSED TIME duration (in seconds) for which a query should have executed for it to be regarded as a long running query. The default value is 10.

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

When changing the configuration for specific servers, a “*” beside the text box corresponding to the parameter signifies that these values have to be manually configured by the user. The parameter values that require to be configured will typically be prefixed with a “$” or contain a series of “*”. A value of "none" in the parameter value indicates that the corresponding parameter value can be changed if required.