Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide

/SEGMENTS

Use /SEGMENTS to set the number of logical segments a program can have. You can set number to any value in the range 1 to 16375. See Specifying numeric arguments.

For each logical segment, the linker must allocate space to keep track of segment information. By using a relatively low segment limit as a default (256), the linker is able to link faster and allocate less storage space.

When you set the segment limit higher than 256, the linker allocates more space for segment information. This results in slower linking, but allows you to link programs with a large number of segments.

For programs with fewer than 256 segments, you can improve link time and reduce linker storage requirements by setting number to the actual number of segments in the program.

Default: /SEGMENTS:256

Abbreviation: /SE

Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide