Usage of buffers from a Fast Path buffer pool

The Fast Path buffer pool is used by all Fast Path programs except the DEDB online utilities and the High-Speed Sequential Processing (HSSP) function, both of which have their own buffer pool. The Fast Path buffer pool is used to support the processing of MSDBs and DEDBs.

The Fast Path buffer pools in an IMS system can be either defined automatically by IMS by enabling the Fast Path 64-bit buffer manager or defined manually by specifying the DBBF, DBFX, and BSIZ parameters in the IMS and DBC startup procedures.