SETOMVS command
Use the SETOMVS command to change dynamically the options that z/OS UNIX System Services currently is using. These options are originally set in the BPXPRMxx parmlib member during initial program load (IPL). For more information on the BPXPRMxx parmlib member, see z/OS UNIX System Services Planning.
Changes to all of the system-wide limits take effect immediately.
When a process limit is updated, all processes that are using the
system-wide process limit have their limits updated. All process limit
changes take effect immediately except those processes with a user-defined
process limit (defined in the OMVS segment or set with a SETOMVS PID=
command). Exceptions are MAXASSIZE and MAXCPUTIME, which are not changed
for active processes.
Note: If a process-level limit is
lowered with the SETOMVS command, some processes may immediately hit
100% usage. Depending on the process limit specified and what the
process is doing, this could cause some processes to fail.