I have a VSAM File which is read sequentially, and taking longer time during the Execution time. I have tried using the Buffering values in the JCL. But, didn't have a luck...
I coded AMP=('BUFND=9,BUFNI=7') but still taking more exception count. What are the optimum values to be coded in the JCL. Please refer the attached document for the LISTCAT entries of the dataset.
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Joined: 06 Jun 2008 Posts: 8696 Location: Dubuque, Iowa, USA
Quote:
I have a VSAM File which is read sequentially, and taking longer time during the Execution time.
This is a completely meaningless statement. Taking longer time than what? Without some basis for comparison you should not be even including such a statement in your post.
Try
Code:
AMP=('BUFND=50,BUFNI=4')
or even
Code:
AMP=('BUFND=100,BUFNI=4')
My rule of thumb is to set BUFND to read a full cylinder, which would be 45 CI.