dbcc checkdb - things you find
I was sorting out some corruption in a database , error 8966 for the curious, which was preventing a backup occuring which is always bad news.
I just happened to run across the option ESTIMATEONLY which gives an idea of how much tempdb space is required for a checkdb, use as dbcc checkdb with estimateonly returns the estimated space for CHECKALLOC and CHECTABLE(s) learn something new every day!!!