Difference in MAX TASKS between runtime and what is in SysGen

Products

• IDMS
• IDMS - Database

Issue/Introduction

Why is the value listed for Max Tasks in the output of DCMT DISPLAY STATISTICS SYSTEM always larger than what is in the System Generation (sysgen) SYSTEM statement.

Environment

Release: All supported releases.

Resolution

The value specified for MAXIMUM TASKS in the sysgen SYSTEM statement is the maximum number of internal online user tasks anticipated for use by the CV at any one time.

At startup, that value is added to several other sysgen related parameters to come up with a runtime value for MAX TASKS. The parameters added include, but are not limited to, MAX ERUS, system tasks for the various line drivers, one each for MASTER and DBRC, run-unit service drivers, and deadlock detection service drivers.

If MAX TASKS is varied at run time with DCMT VARY ACTIVE TASK MAX TASKS nn, this applies to the runtime value as calculated at startup, not the value specified in sysgen.