When IBM announced support for running application code in the Open Transaction Environment (OTE), among the selling points was a significant reduction in CPU utilization in CICS-DB2 applications. Unfortunately, the possibility of reducing an application’s CPU requirements by 30 percent, without any coding changes, diverted attention from the OTE’s many other benefits. This article discusses those benefits and related OTE issues.

The OTE and threadsafe provide a significant architectural change to CICS. For the first time, CICS provides a true multi-processing environment running application code under multiple Task Control Blocks (TCBs) within the same…

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