APT_DISABLE_COMBINATION environment variable in DataStage

The APT_DISABLE_COMBINATION environment variable globally disables operator combining.

Operator combining is the default behavior of DataStage®, in which any number of operators within a step are combined into one process where possible.

You might need to disable combining to facilitate debugging. Disabling combining generates more UNIX processes, and hence requires more system resources and memory. It also disables internal optimizations for job efficiency and run times.