Wrong Join-Cardinality with Extended Statistics
Wrong cardinality calculation for multi-column join with filter predicate and extended statistics Continue Reading
Month: October 2020
ORA-07445 in qksqbCheckProp() with Inline Hint
Inline hint can cause ORA-07445 in 18c and 19c. Continue Reading
parallel recovery push change
A stuck nanosleep call impairs a parallel recovery process. The affected parallel recovery process spends 100% of its time in the undocumented parallel recovery push change wait event. Continue Reading