Which parameters do I need to watch if there is an increase in dynamic rules?

Document ID : KB000116973
Last Modified Date : 04/10/2018
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Our automation group may be increasing the number of dynamic rules. What parameters could be affected by this? AOF parms, rexx? Are there thresholds to watch?
I checked this out with a fellow coworker in OPS/MVS L1 support and we don't think there are any parameters regarding the number of dynamic rules.