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Field notes on diagnosing Oracle performance.
- July 29, 2026
Baseline discipline: capturing artifacts before you need them
What to export on every release so a regression is diffable instead of a guess.
- July 22, 2026
What SQLT dumps tell you that AWR doesn't
Optimizer parameters, clustering-factor drift, and histogram changes — the per-statement detail AWR rolls up.
- July 15, 2026
Reading a plan regression in five minutes
One cost jump from an index range scan to a full table scan — what to check, and the fix.