But then my next Q; What is considered normal and abnormal?
Normal = normal for your system
Abnormal = not normal for your system.
If a query runs normally 2 minutes and is running 25 minutes today, that's abnormal.
If a query runs normally 2 minutes and is running 5 seconds today, that's also abnormal.
Right at this moment, I'm tuning a query that's running on average 50ms. I'm tuning it because it runs around 250000 times an hour and is normally under 10ms.
What do you look for when using profiler? Which data columns e.g. shows you ... oke wait something is bad there..?
By themselves, none of them.
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)SQL In The Wild
: Discussions on DB performance with occasional diversions into recoverability
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