To avoid installation exit communication problems, an installation
should terminate:
All address spaces except the master scheduler address space.
The system address spaces (such as PCAUTH, ALLOCAS, and GRS)
The job entry subsystem before issuing a SET command that changes
the EXIT keyword.
The SET command cannot be used to change the SID parameter; if
a value is specified, it is ignored. If processor serial numbers were displayed in message IEE967I
prior to issuing the SET command, they will no longer be displayed
following the SET command. Also, the SID parameter displayed in message
IEE967I following the SET command will show an origin type of DEFAULT.
In this case, DEFAULT indicates that
the SID value is the value that was specified at IPL.
The new values for STATUS or MAXDORM do not take effect until
the old ones, if any, expire.
For each IPL, you can define a maximum of eight subsystems to
SMF (by use of the SUBSYS parameter). This is a combined total of
subsystems specified at IPL and subsequent SET commands. If the maximum
is reached, no new subsystems may be added. Subsystems previously
specified can be given different options.
In response to a SET command, SMF issues a subsystem interface
(SSI) call to each user-defined subsystem specified in the SMF parameters
SUBSYS and/or SUBPARM. This includes parameters specified in previous
SET commands and at IPL.
Unless it is necessary, recording data set switching does not
take place at SET time. For example, if the current active data set
is not included in the new options, the first empty data set in the
new data set list becomes the active recording data set.
If recording is not active at SET SMF time, the first non-full
data set is used as the recording data set.