What is the maximum number of active generations of an application?

Document ID : KB000029454
Last Modified Date : 14/02/2018
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Title: What is the maximum number of active generations of an application?

Solution:

The maximum number of active generations of an application is 255. 

This number is limited by the maximum size of the JOBINDEX record (a VSAM KSDS file), and cannot be changed.

When the number of active generations reaches 255, the oldest active generation is forced completed. 

When this occurs, the forced completed jobs/applications will still show in the scoreboards with status "FORCED**/Force pending ***",

and they cannot be updated or deleted.  They are removed after WA ESP restarted.

 

When the number of active generations reached 250, the following warning messages are issued, and processing will continue:

ESP4175W APPLICATION xx, User yy, IS REACHING THE LIMIT OF ACTIVE GENERATIONS

ESP4174W APPLICATION xx GENERATION nn, User yy, WILL BE FORCED COMPLETE BY ESP

 

If there's a need to run many generations concurrently in a short period of time, consider using a dynamic APPL name.

Example: APPL%ESPSSS  or APPL%ESPSTH

(Symbolic variable ESPSSS contains the number of seconds; ESPSTH contains the number of hundredths of a second.)