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However, with older transformations, you might want to try to run the transformation with higher values. In most cases this will not make that much difference.
HoweverThat being said, consider that increasing the RowSet buffer size might make a difference in situations like these:
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These last 2 items are in there because identical steps running in parallel will increase the likelihood of excessive locking on rows that pass from one step to another. Increasing the maximum row set buffer can help out to reduce this effect.
The maximum number of rows in the row sets can be changed in the Transformation settings dialog (CTRL-T keyboard shortcut): 