Performance debugging

The Performance Debugging tool identifies memory usage and memory leaks in specific TDI components by collecting information at specific intervals and upon certain actions.

Data collected by the Performance Debugging tool

This feature logs the following information:

• Component name

• Time (in milliseconds)

• Memory usage

Component names are prefixed with the name of the AssemblyLine instance that uniquely identifies each component.

Memory usage is the difference between total memory available (JVM) at start and total memory available at end for each component during its execution.

Before AssemblyLine terminates, the performance entry that contains performance statistics is logged. This is then followed by logging of the overall AssemblyLine performance statistics.

Run the Performance Debugging tool

To run the Performance Debugging tool, use one of the following methods:

• Start the server using the -T parameter

  ibmdisrv -T

• Start the server by setting the following property in the global.properties or solution.properties file:

  ## Enable\Disable performance logging
  com.ibm.di.server.perfStats=true
  

The -T parameter takes precedence over the solution.properties file setting. If the com.ibm.di.server.perfStats value is set to false, we can still obtain performance statistics by starting the server using the -T parameter.