Andy Brownsword speeds things up:
When using data flows in SSIS packages we want the flow to be fast and fluid. Improving performance of the flows will vary in different packages, but one element can consistently help – tuning memory utilisation.
In this post we’ll look at tuning the memory utilisation by altering the number of rows passing through the flow concurrently. Specifically we’re looking at the following properties:
DefaultBufferSizeDefaultBufferMaxRows
This is a pretty big deal, finding the right size that allows you to keep data flowing smoothly without having to wait for buffers to fill. The defaults are aggressively low in most cases. And good on Andy for providing a series of tests to give practical numbers.