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Defining transactions z/OS DFSMStvs Planning and Operating Guide SC23-6877-00 |
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You should not simply modify an existing batch job to use DFSMStvs with no further changes. This would cause the entire job to be seen as a single transaction and locks would be held. The log records would need to exist for the entire life of the job. This could cause a tremendous amount of contention for locked resources, and it could also cause performance degradation as the undo log becomes exceedingly large. |
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