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Advanced Oracle Troubleshooting Guide, Part 5: Sampling V$ stuff with WaitProf. Really fast. Using SQL!

I bet you thought I’ll be writing about direct SGA access?! ;) Nope! Direct SGA access has excellent troubleshooting potential (as long as you know the shared memory data structures), but it has one major drawback – very few companies … Continue reading

Posted in Cool stuff, Oracle | Tagged , , , , | 31 Comments

Oracle hidden costs revealed, part 1 – Does a batch job run faster when executed locally?

This series is about revealing some Oracle’s internal execution costs and inefficiencies. I will analyze few situations and special cases where you can experience a performance hit where you normally wouldn’t expect to. The first topic is about a question … Continue reading

Posted in Uncategorized | Tagged , , , | 13 Comments