Improving performance

To achieve and maintain the best possible performance for your CICS® systems, you can tune the environment and CICS settings to best match the requirements of your application workloads.

This information includes general recommendations that are based on current knowledge of CICS. These recommendations cannot be guaranteed to improve the performance of a specific system.

• Measuring, tuning, and monitoring: the basics
  Good performance is the achievement of maximizing the use of your system resources, which helps towards reaching service level agreements efficiently.
• Improving the performance of a CICS system
  Tuning is a key factor in improving the performance of a CICS system. You must always tune DASD, the network, and the overall MVS™ system before tuning any individual CICS subsystem through CICS parameters. Before you tune a system, you must understand why your CICS system is not performing as expected.
• Improving DBCTL performance
  You can tune your CICS-DBCTL setup to make efficient use of resources to help you reach performance objectives.
• Improving data table performance
  CICS produces statistics information to help you monitor the activity on your data tables. You can use the information contained in a CICS statistics report to evaluate the benefits of using data table services.
• Improving event processing performance
  CICS Event Processing (EP) consists of three main components: capturing an event, dispatching the EP adapter, and emitting the event by running the EP adapter. For each component, different factors influence performance.
• Improving FEPI performance
  You cannot tune FEPI itself because it is already optimized for speed of response. However, you can manage the performance of FEPI applications.
• Improving intersystem performance
  There are a number of ways that you can improve aspects of CICS performance in a multi-system environment.
• Improving Java performance
  You can take various actions to improve the performance of Java™ applications and the JVMs in which they run.
• Improving ONC RPC performance
  The performance of a single client request is affected by various aspects of the client, the network, CICS ONC RPC, the user-replaceable programs, and CICS.
• Performance and tuning of CICS web support
  You can tune several aspects of your system to improve the performance of CICS web support.

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improving_performance.html | Last updated: Thursday, 27 June 2019