Summary
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Tuning CICS log streams for performance involves understanding the CICS region, the operating environment and workload. External factors, such as DASD response time and CF access time, make the task more challenging, but not insurmountable.
Data residency time is key to controlling the amount of storage required by the System Logger for duplexing the data to the dataspace. Data residency time is also key to establishing an even movement of data from non-system logs to the offload data sets.
Understand the tools which are available and how they can be used for log stream analysis.
As the environment changes, such as an increase in workload, a new level of the Coupling Facility Control Code, new applications, a new release of the operating system and a new release of CICS, ensure the log streams sizes are still valid.
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