Optimizing comdb2 for running TPCH (OLAP) benchmark

Same as TPCC, I also got a question about how to tune parameters for TPCH. But since this is an OLAP database, I am not sure which part I should focus on.
We are using TRANSACTION_READ_COMMITTED isolation but since this is OLAP so we will only run it with 1 terminal. (I don't think the scale factor matters here; please correct me if I am wrong.)

I am not sure from which part should I begin to think about this and which part should be same for both OLAP and OLTP.

Thanks!