Library in the LPA/ELPA

Placing the COBOL and the LE library routines in the Link Pack Area (LPA) or Extended Link Pack Area (ELPA) can also help to improve total system performance.

This will reduce the real storage requirements for the entire system for COBOL/370, COBOL for MVS™ & VM, COBOL for OS/390® & VM, Enterprise COBOL, VS COBOL II RES, or OS/VS COBOL RES applications since the library routines can be shared by all applications instead of each application having its own copy of the library routines. For a list of COBOL library routines that are eligible to be placed in the LPA/ELPA, see members CEEWLPA and IGZWMLP4 in the SCEESAMP data set.

Placing the library routines in a shared area will also reduce the I/O activity since they are loaded only once when the system is started and not for each application program.

related references
Modules eligible for the link pack area (z/OS Language Environment Customization)
Planning to link and run with Language Environment® (z/OS Language Environment Runtime Application Migration Guide)