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A SQL Server restart zeroes the usage counters that justify dropping an index
sys.dm_db_index_usage_stats counts seeks, scans and lookups only since the instance came up, so an index with no reads may just be waiting for its monthly job. One cross join puts that window in the report.
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Reality
- Evidence65
- Adoption
- Insufficient
- Hype gap−12
- Incentives20
- Confidence72