Parsed test spec with 3 sessions starting permutation: s2insert s3insert s1commit pg_advisory_xact_lock step s2insert: INSERT INTO ctoast (key, val) VALUES (1, ctoast_large_val()) ON CONFLICT DO NOTHING; step s3insert: INSERT INTO ctoast (key, val) VALUES (1, ctoast_large_val()) ON CONFLICT DO NOTHING; step s1commit: COMMIT; step s2insert: <... completed> step s3insert: <... completed>