DBCC CHECKDB requires some amount of temporary space, to find the amount of space required in advance using ESTIMATEONLY option it will estimate amount of space required. Example: SET NOCOUNT ON DBCC CHECKDB ('AdventureWorks') WITH ESTIMATEONLY GO Estimated TEMPDB space needed for CHECKALLOC (KB) ------------------------------------------------- 70 Estimated TEMPDB space needed for CHECKTABLES (KB) -------------------------------------------------- 198468 … Continue reading DBCC CHECKDB – Estimate →