Some have said that batch tuning is a dying trade, there are other, new, exiting technologies that Capacity and Performance analysts should be dealing with. Why then is it still necessary? Although batch tuning techniques are certainly 'mature' there are now many reasons why the batch window has to be squeezed. Businesses want their online systems available earlier in the morning and later at night, continuity of business/disaster recovery backups may be eating into the critical path, business growth may be excessively high or perhaps the batch processing was not well designed in the first place. This paper documents a case study where a major international corporate bank had to reduce the end-of-year batch window '…by at least four hours' to allow Euro conversion processing to take place over 'le weekend'.
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