How to Enable 23D Feature:Pay Daemon Group

We are trying to Enable the 23D Feature:Pay Daemon Group which will boost the performance. But to enable it,oracle has outlined that we will need to first add the maximum number of threads parameter in the Default group and then based on the theads there,define the same parameter in the Pay Daemon Group and set the thereads to maximum 10% of that on the default group. The issue is,the maximum number of theads parameter is not added in the Default Group and so we are curious what does this parameter do and how can we decide what no of threads