CTLPAGES is a system parameter that specifies the size of P1 pool. CTLPAGES is automatically changed only when the process logical name table, DCL symbols, or some layered products require an increase in the size of the P1 pool area.
This special parameter is use by VSI and is subject to change. Donot change this parameter unless VSI recommends that you do so.
CTLPAGES is an AUTOGEN parameter.