Specifying Message Buffer Space

You specify the maximum message buffer space on the MAXMSG keyword of the COUPLE, CLASSDEF, PATHOUT, PATHIN, and LOCALMSG statements in the COUPLExx parmlib member. If you implement signaling through list structures, the MAXMSG value takes effect for all paths on that system that are started through that structure. You can modify these values using the SETXCF MODIFY command.

Table 1 summarizes the MAXMSG values that the system uses if MAXMSG is not specified on the statement:

Table 1. MAXMSG Values on COUPLE Statements
Statement	MAXMSG Value If Not Coded on Statement
COUPLE	2000K
CLASSDEF	MAXMSG value, if coded on COUPLE statement; otherwise, 2000K
PATHOUT	MAXMSG value, if coded on CLASSDEF statement for the transport class. If MAXMSG is not coded on CLASSDEF statement, then MAXMSG value for COUPLE statement Otherwise, 2000K
PATHIN	MAXMSG value, if coded on COUPLE statement; otherwise, 2000K
LOCALMSG	None; that is, zero