I don't know about the DB2 utility itself, but any authorized program is allowed to bypass "region" limits (and that includes MEMLIMIT). Whether they should, and by how much they should choose to exceed, are different questions.
This is little different in spirit (perhaps different in scale) than that any authorized program can get storage not within the user region so is not bound by the below-2G region limits. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN