The Transaction Reporting Facility (TRF) component of OMEGAMON XE For IMS is used to create information needed for chargeback and IMS performance analysis. There can be overhead considerations when enabling Transaction Reporting Facility. The following APAR, OA33784, mentions overhead considerations when the DB2 collection option is enabled. Specifically, if the user is running BMPs, there will be additional TRF overhead for the DB2 collection portion, whether the BMP option is set to ON or OFF.
If you are running TRF you will want to take a look at this APAR: