https://www.ibm.com/docs/en/ims/15.3.0?topic=itme-otma-fast-transaction-pipe-checkpoint-cleanup-fasttpcu-enhancement
IMS 15.3 - Release planning - OTMA fast transaction pipe checkpoint cleanup (FASTTPCU) enhancement
In IMS 15.3, the OTMA fast transaction pipe (tpipe) checkpoint cleanup enhancement allows an IMS system to delete an idle OTMA tpipe more frequently.