CPU 100% CCR1036 problems by queue type pcq

good morning people,
I am having a problem with the configuration of the limit and total limit parameters on the configuration of queue type pcq.
We currently work with profiles of 150 Megabytes and we have approximately 600 clients connected, working with PPPoE + mangle + queue concentrators to limit the profiles. A couple of days ago, I began to increase the CPU to 100% without going down in the moments of maximum traffic (approximately 1.2 gb of traffic over 10 GB interfaces). Investigating and seeing the configurations of the equipment we found that the way to normalize it is by changing the total limit, currently we have configured them in the following way:
Limit: 1536k
Total Limit: 14336000
I know it is not well configured but it is a way that we are normalizing it.
Now although I have read documentation, I have not seen it completely clear on how to implement it well on a situation like mine.
I would like to ask you about what configuration or what you recommend doing to normalize this CPU issue in the equipment.