Why Has My Plan Changed. Top 7 Plan Stability Pitfalls and How To Avoid Them!
Track
DBA & Infrasturktura
Datum i vrijeme
petak, 20. listopad 2017., 09:30
Dvorana
Dvorana A
Trajanje
45'
When you write SQL, Oracle runs it through the Optimiser to determine the fastest way to access the data. This access path sometimes changes without anyone noticing. Sometimes it\'s faster. Sometimes it\'s slower. Dramatically, catastrophically slower.Why doesn\'t Oracle always get it right? Why does it change?This presentation will answer the question Why - through the use of live demonstrations, and explain what we can do to manage SQL execution plans within the database and minimise the opportunity for Oracle to get it wrong.
Detalji o predavanju
O predavaču
Neil Chandler, autor
Neil has been working in IT since 1988, and with Oracle since 1991 both in a Production Support and Development capacity. He is an independent consultant who specialises in RAC, DataGuard, Goldengate and Performance Tuning.Neil is an Oracle ACE and is the Chairman of the RAC, Cloud, Infrastrcuture and Availability SIG for the UK Oracle User Group, and is currently organizing UKOUG Tech17.He likes to drink good coffee, beer and whisky, depending upon the time of day.
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HrOUG.hr
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