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I'm digging into sys.dm_db_index_usage_stats and finding that a number of our indexes are used exclusively in user_scans, not user_seeks. Does this imply that the index is useless and should be redesigned?


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up vote 4 down vote accepted

Not useless, but maybe sub-optimal. Scanning a 10 MB index is a hell of a lot faster than scanning a 1 GB table, though a seek would be even better. Can you tell us more about the indices? How are the tables being used?

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Great point! I am just starting to examine a variety of databases we have around here to make some suggestions on where things can be improved - I will be digging deeper... and probably posting more questions. :) – JHFB Mar 7 '12 at 18:57

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