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Consistent gets and physical gets

What are consistent gets and physical gets? Which one of them should be less when we execute a query.

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Consistent gets represent logical I/O (i.e. memory accesses).
Physical gets represent physical I/O (i.e. disk accesses).

Excessively high numbers of either is not good, but you should pay most careful attention to the logical I/O being consumed. Usually if you take care of logical I/O, physical I/O will also decrease.

This was first published in March 2004

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