Parsed test spec with 2 sessions starting permutation: s1b s2b1 s1l s2l s1u s1c s1ul s2c step s1b: BEGIN; step s2b1: BEGIN ISOLATION LEVEL READ COMMITTED; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s1c: COMMIT; step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: <... completed> id|value --+----- 1|one 2|two (2 rows) step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b1 s1l s1u s2l s1c s1ul s2c step s1b: BEGIN; step s2b1: BEGIN ISOLATION LEVEL READ COMMITTED; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1c: COMMIT; step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: <... completed> id|value --+----- 1|one 2|two (2 rows) step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b1 s1l s1u s1ul s2l s1c s2c step s1b: BEGIN; step s2b1: BEGIN ISOLATION LEVEL READ COMMITTED; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1c: COMMIT; step s2l: <... completed> id|value --+----- 1|one 2|two (2 rows) step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b1 s1l s2l s1u s1c s1hint s1ul s2c step s1b: BEGIN; step s2b1: BEGIN ISOLATION LEVEL READ COMMITTED; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s1c: COMMIT; step s1hint: SELECT * FROM lcku_table; id|value --+----- 1|one 2|two (2 rows) step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: <... completed> id|value --+----- 1|one 2|two (2 rows) step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b1 s1l s1u s2l s1c s1hint s1ul s2c step s1b: BEGIN; step s2b1: BEGIN ISOLATION LEVEL READ COMMITTED; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1c: COMMIT; step s1hint: SELECT * FROM lcku_table; id|value --+----- 1|one 2|two (2 rows) step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: <... completed> id|value --+----- 1|one 2|two (2 rows) step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b1 s1l s1u s1ul s2l s1c s1hint s2c step s1b: BEGIN; step s2b1: BEGIN ISOLATION LEVEL READ COMMITTED; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1c: COMMIT; step s2l: <... completed> id|value --+----- 1|one 2|two (2 rows) step s1hint: SELECT * FROM lcku_table; id|value --+----- 1|one 2|two (2 rows) step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b2 s1l s2l s1u s1c s1ul s2c step s1b: BEGIN; step s2b2: BEGIN ISOLATION LEVEL REPEATABLE READ; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s1c: COMMIT; step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: <... completed> ERROR: could not serialize access due to concurrent update step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b2 s1l s1u s2l s1c s1ul s2c step s1b: BEGIN; step s2b2: BEGIN ISOLATION LEVEL REPEATABLE READ; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1c: COMMIT; step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: <... completed> ERROR: could not serialize access due to concurrent update step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b2 s1l s1u s1ul s2l s1c s2c step s1b: BEGIN; step s2b2: BEGIN ISOLATION LEVEL REPEATABLE READ; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1c: COMMIT; step s2l: <... completed> ERROR: could not serialize access due to concurrent update step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b2 s1l s2l s1u s1c s1hint s1ul s2c step s1b: BEGIN; step s2b2: BEGIN ISOLATION LEVEL REPEATABLE READ; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s1c: COMMIT; step s1hint: SELECT * FROM lcku_table; id|value --+----- 1|one 2|two (2 rows) step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: <... completed> ERROR: could not serialize access due to concurrent update step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b2 s1l s1u s2l s1c s1hint s1ul s2c step s1b: BEGIN; step s2b2: BEGIN ISOLATION LEVEL REPEATABLE READ; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1c: COMMIT; step s1hint: SELECT * FROM lcku_table; id|value --+----- 1|one 2|two (2 rows) step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: <... completed> ERROR: could not serialize access due to concurrent update step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b2 s1l s1u s1ul s2l s1c s1hint s2c step s1b: BEGIN; step s2b2: BEGIN ISOLATION LEVEL REPEATABLE READ; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1c: COMMIT; step s2l: <... completed> ERROR: could not serialize access due to concurrent update step s1hint: SELECT * FROM lcku_table; id|value --+----- 1|one 2|two (2 rows) step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b3 s1l s2l s1u s1c s1ul s2c step s1b: BEGIN; step s2b3: BEGIN ISOLATION LEVEL SERIALIZABLE; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s1c: COMMIT; step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: <... completed> ERROR: could not serialize access due to concurrent update step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b3 s1l s1u s2l s1c s1ul s2c step s1b: BEGIN; step s2b3: BEGIN ISOLATION LEVEL SERIALIZABLE; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1c: COMMIT; step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: <... completed> ERROR: could not serialize access due to concurrent update step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b3 s1l s1u s1ul s2l s1c s2c step s1b: BEGIN; step s2b3: BEGIN ISOLATION LEVEL SERIALIZABLE; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1c: COMMIT; step s2l: <... completed> ERROR: could not serialize access due to concurrent update step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b3 s1l s2l s1u s1c s1hint s1ul s2c step s1b: BEGIN; step s2b3: BEGIN ISOLATION LEVEL SERIALIZABLE; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s1c: COMMIT; step s1hint: SELECT * FROM lcku_table; id|value --+----- 1|one 2|two (2 rows) step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: <... completed> ERROR: could not serialize access due to concurrent update step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b3 s1l s1u s2l s1c s1hint s1ul s2c step s1b: BEGIN; step s2b3: BEGIN ISOLATION LEVEL SERIALIZABLE; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1c: COMMIT; step s1hint: SELECT * FROM lcku_table; id|value --+----- 1|one 2|two (2 rows) step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: <... completed> ERROR: could not serialize access due to concurrent update step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row) starting permutation: s1b s2b3 s1l s1u s1ul s2l s1c s1hint s2c step s1b: BEGIN; step s2b3: BEGIN ISOLATION LEVEL SERIALIZABLE; step s1l: SELECT pg_advisory_lock(578902068); pg_advisory_lock ---------------- (1 row) step s1u: UPDATE lcku_table SET id = 2 WHERE id = 3; step s1ul: SELECT pg_advisory_unlock(578902068); pg_advisory_unlock ------------------ t (1 row) step s2l: SELECT * FROM lcku_table WHERE pg_advisory_lock(578902068) IS NOT NULL FOR KEY SHARE; step s1c: COMMIT; step s2l: <... completed> ERROR: could not serialize access due to concurrent update step s1hint: SELECT * FROM lcku_table; id|value --+----- 1|one 2|two (2 rows) step s2c: COMMIT; pg_advisory_unlock_all ---------------------- (1 row) pg_advisory_unlock_all ---------------------- (1 row)