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What criteria determines when code should be pinned?

What criteria determines when code should be pinned? Using the following SQL do I pin those with the most loads? Runs? Or some other criteria?
SELECT Owner, Name, Type, Sharable_mem, Loads, Kept, Executions, Locks,
Pins   FROM v$db_object_cache  WHERE type in ('PROCEDURE','PACKAGE 

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Choose to pin objects based first on number of executions and second on size (sharable_mem). If two objects have the same number of executions and you must choose between them, pin the larger of the two.

This was first published in December 2005

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