KPI for paging load in a cell

[b20ruo]

Hi all

Could you help me by telling me what KPI shows me the paging load in a cell? Or if there is a formula, what KPI should I use?
Vendor is Huawei, RAN 10, 1 channel SCCPCH activated. I want to see the paging load in case its to high, to activate the second channel.

Thank you
Loz