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Let us finally focus on my problem.I will come back to my query : As a reminder – the predicates which are of the greatest importance are the following : The state before tuning If not timed out after 2 minutes (such constraint was applied at the application layer) with the SQL Plan depicted below…
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After this rather long discussion of what led the optimizer to choose one index over another — and, more importantly, of the significant consequences this choice brought — let us return to my test query.Bad news though – we are still not done with the optimizer’s internal decision-making, so this means diving yet again into…
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Latest posts
- Be cautious when the optimizer estimates a cardinality of 1 – Part2
- Be cautious when the optimizer estimates a cardinality of 1 – Part1
- Be cautious when the optimizer estimates a cardinality of 1 – Part3
- When OEM meets the CBO: cardinality chaos across containers – Part 1
- When OEM meets the CBO: cardinality chaos across containers – Part 2
- Auto SQL Plan Management (look under the hood) – part 1
- Auto SQL Plan Management (look under the hood) – part 3
- Auto SQL Plan Management (look under the hood) – part 2
- Converting of CPU Costing in the Cost Based Optimizer 10053 Trace File
- Why this extra physical read while performing index scan?