APPC Subsystem on MPE/XL Node Manager's Guide (30294-90007)

104 Chapter4
APPC Subsystem Configuration
Planning APPC Configuration
The number of sessions you will need for each session type is
[(instances of TP1) ö (simultaneous conversations with TP1)]
+ [(instances of TP2) ö (simultaneous conversations with TP2)]
.
.
.
+ [(instances of TP
n ) x (simultaneous conversations with TP n )]
where TP1, TP2,...TP n are the transaction programs that will be using
the session type at the same time.
Planning Automatic Session Activation
When you configure a session type, you specify how many sessions of
that type will activate automatically at subsystem startup. No more
than 256 sessions may be active at once, so the sum of all the
automatically activated sessions, for all APPC session types, may not
exceed 256.
Once the APPC subsystem has started up, you can use the
APPCCONTROL SESSIONS command or the APPCSessions intrinsic to
change the number of active sessions or reapportion sessions among
different session types during run time. See Chapter 5 , “Managing the
APPC Subsystem,” for more information.