The following tips can be used to evaluate performance metadata and tune the job script:
- Determine the difference in CPU utilization between the producer and consumer operators. For example, if the CPU utilization of the producer operator is 2 times greater than that of the consumer operator, increasing the number of producer instances by a factor of 2 might improve the throughput of the job.
- Determine the difference between the CPU utilization and the elapsed time for performing the exporting and loading of data (i.e., the EXECUTE method). If the elapsed time is much higher than the CPU time, this could mean that some bottlenecks might have occurred either on the network, I/O system, or the Teradata server.
- Find out how many rows were sent by the producer operator (or received by the consumer operator) with the CPU utilization. Dividing the numbers of rows by the CPU seconds spent on processing these rows would give you the number of rows per CPU second.
- The difference between the “start time” of two successive methods would indicate how long the job spent on a method.
- Find out how much time being spent on each checkpoint. Note checkpoint takes time and resources to process. Tuning the number of checkpoints to be taken by changing the checkpoint interval is necessary.