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Totally agree with the "Every CPU cycle matters". It might be more easier to save cpu cycle by saving I/O, utilizing data locality (with in datacenter racks) or even better serialization (binary, columnar or indexed).

Reducing locking and using shorter data type seem inadequate for the "Big Data" scene.

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You are exactly right, however Vertica already handles the data locality, columnar data storage and data compression for us. Vertica is so good at its job that we are CPU bound on most queries and these types of strategies around reducing locking and using shorter data types make a difference.

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