SQL Server Seek vs Scan: Why a Flat Read Count Lies
A flat read count can hide an index sliding from seeks to scans. Here is how the SQL Server seek vs scan ratio exposes it before queries slow down.
A flat read count can hide an index sliding from seeks to scans. Here is how the SQL Server seek vs scan ratio exposes it before queries slow down.
When a query filters a large table on a range, like a date window, and no index supports that range, SQL Server scans the table. Put that scan inside a subquery that gets joined to other inputs, and a query that should take seconds can run for hours. In a recent case, one covering index took a query from almost two hours in the worst case down to about four seconds. What is an unindexed range predicate? A range predicate …
Database Health Monitor 4.1626 adds an Index Consolidation Plan with a rollback script, reports for Service Broker, data protection and Analysis Services, and an opt-in read-only web dashboard.
A walkthrough of the Suspect Pages report and the msdb suspect_pages table behind it: which column to read first, and how to spot a page still failing.
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Who can see SSRS reports on your server? Find the items that broke inheritance, the hidden Content Managers and the users who left, straight from the catalog.
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