Taking abend probabilities into consideration

With CICS/ESA 4.1 and later, CICSPlex® SM can evaluate both the health and activity (or load) of each target region identified by the Target Scope. This information, along with the abend probability values you provide when defining transaction groups to CICSPlex SM, is then used in determining to which target region a particular transaction should be routed. That is, it is used as a guide to avoiding target regions where the abend probability is greater than is acceptable for a given transaction or set of transactions within the transaction group.

Note:
For any transactions that are not associated with a transaction group, the default abend probability values defined in the workload specification are used.

The probability that a transaction will abend if routed to a particular target region is calculated in one of the following ways:

The abend probability values that you provide cover both the health and load of a potential target region, where:

Notes:
  1. Once an affinity is active, all subsequent transactions are routed to the same target region for as long as the affinity remains active, regardless of its abend probability.
  2. If a transaction abends in a target region with EXEC CICS HANDLE ABEND in force, CICSPlex SM does not receive the information that the abend has occurred. Therefore, CICSPlex SM cannot take such abends into account when calculating the probability that a transaction will abend in that target region. In other words, the abend probability might stay low in this situation, even though abends had occurred.

Related concepts
Workload management and dynamic routing
Workload requirements
Establishing a workload
Balancing the work in a workload
Separating the work in a workload
Taking affinity relations into consideration
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