If resource limits are configured for a user in the SGI IRIX User Limits Database (ULDB) domain specified in LSF_ULDB_DOMAIN, and there is no domain default, the system default is honored.
If LSB_KEEP_SYSDEF_RLIMIT=n, and no resource limits are configured in the domain for the user and there is no domain default, LSF overrides the system default and sets system limits to unlimited.