Program storage

CICS creates a separate copy of the variable area of a CICS program for each transaction using the program. This area is known as program storage.

This area is called the WORKING-STORAGE SECTION in COBOL, automatic storage in C, C++, and PL/I, and the DFHEISTG section in assembler language. Like the TWA, this area is of fixed size and is allocated by CICS without you having to issue a GETMAIN command. The EXEC CICS interface sets up addressability automatically. Unlike the TWA, however, this storage lasts only while the program is being run, not for the duration of the transaction. This makes it useful for data areas that are not required outside the program and that are either small or, if large, are fixed in size and are required for all or most of the execution time of the program.