This paper identifies some of the factors that can affect the performance of COBOL programs when using IBM Enterprise COBOL Version 4 Release 2 running with the Language Environment component of z/OS Version 1 Release 11. It also contains a summary of the performance experiences that we have had with IBM Enterprise COBOL. The tuning methods discussed here are intended to assist users in selecting from the various options which are available for compiling COBOL programs with IBM Enterprise COBOL Version 4 Release 2 and executing them with the Language Environment component of z/OS Version 1 Release 11. These methods provide the COBOL programmer with the opportunity to tune the LE run-time environment to potentially improve CPU time performance and the use of system resources.
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