Remember that run-time limits and operating system limits may be lower than those of the COBOL Compiler.
Index key Limits
| Per file (including split-key components) | 255 keys |
| Length of any one key, including split-key | 1016 bytes (performance best below 512) |
| Number of components in a split key | 62 |
| Number of alternate keys: | 252 |
SORT/MERGE Operation Limits
| Number of SORT input files: | 128 |
| Number of INCLUDE/OMIT conditions: | 1024 |