CICS Attach
CICS Attach Module
The Db2 for z/OS CICS ZMARS module will examine your setup for the CICS configuration across the z/OS Parallel Sysplex.
The Triton study team will produce an easily consumable report with prioritised findings and recommendations that, if implemented, will enhance your ability to:
- Run an optimised set of high volume and critical business transactions to reduce CPU consumption
- Achieve a proper balanced design across the CICS and Db2 configuration for robustness and application availability

Why It Matters
Having a properly balanced balance design across the CICS and Db2 configuration with fine grained transaction routing and no transaction affinities is critically important to avoid:
Performance Issues
Sporadic, unpredictable response times, complex debug of performance problems, single points of failure and increased risk of Db2 member crashes.
Efficiency Gains
Avoid missing major CPU performance reduction from intelligent optimised use of CICS-Db2 thread reuse combined with running Db2 packages bound with the RELEASE DEALLOCATE option.
Operational Resilience
Avoid time-consuming decision-making and manual operations to ensure that reconnection after component failure resolves any in-doubt units of recovery.
Key Action Tasks

- Ensuring a fixed topology with proper balance across the Db2 data sharing group for robustness
- Verifying replicated CICS applications with redundancy supported by fine grained transaction routing for continuous availability
- Identifying and mitigating any risk of a “storm drain” effect on Db2 member failure

- Assessing good optimized design using CICS-Db2 thread reuse complemented by using Db2 packages bound with RELEASE DEALLOCATE) to optimise CPU performance
- Ensuring no missed opportunities for further performance savings
- Evaluating a robust strategy for resolving in-doubt units of work
Workload Manager
Are you configured defensively to maximise service availability in the event of contention for machine resources, realising your service level objectives, and ensuring your business critical workloads are protected from unplanned spikes in resource usage?
IMS Attach
Have you configured your IMS-Db2 attachment defensively, with regards to workload distribution, application affinities, IMS message region configuration, and CPU optimisation?
Distributed Application Connectivity to Db2 for z/OS
Have you configured your distributed environment optimally, focussing on client configuration, workload balancing, resilience, and efficient resource utilisation?