Estimated IO Cost

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[@robh115]

Thanks for the video. However, what’s the significance of this metric? Seemed like the only significance is that this metric is just a representation of the number of pages retrieved.

[@acayipbiseyya]

No, it's not actually a number like that. What we need to understand here is that the number of pages should be kept low. This can be achieved by setting the table structures and data types correctly. and therefore the input/output cost can be reduced.