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After migration to 12c one SQL runs very slow under named users. Under schema owner runs fast (as ea

edited Aug 21, 2014 5:01AM in SQL Performance (MOSC) 1 commentAnswered

Recently migrated from 10 to 12c. (both linux, 10 was 32bit, 12c is 64bit)

Everything is OK, except ONE sql became very slow. (thousands of times).

Normally all sql-s are executed under named users which have been granted via roles access rights to main schema objects.

Thousands of SQL-s run well after this migration. So far only one has shown "new" behavior.

HOWEVER - this SQL runs FAST if executed under schema owner!

This SQL is complex. Contains with clause, union-s and has several PL/SQL functions (also in where clauses)

Could it be that some right (or quota)  is missing (or to small)?

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