Parsed test spec with 2 sessions

starting permutation: s1a s1b s2a s2b
step s1a: SELECT count (*) FROM drop_chunks('dt',  '2018-12-25 00:00'::timestamptz);
count
-----
   24

step s1b: COMMIT;
step s2a: SELECT typ, loc, mtim FROM DT , SL , ST WHERE SL.lid = DT.lid AND ST.sid = DT.sid AND mtim >= '2018-12-01 03:00:00+00' AND mtim <= '2018-12-01 04:00:00+00' AND typ = 'T1' ;
typ|loc|mtim
---+---+----

step s2b: COMMIT;

starting permutation: s1a s2a s1b s2b
step s1a: SELECT count (*) FROM drop_chunks('dt',  '2018-12-25 00:00'::timestamptz);
count
-----
   24

step s2a: SELECT typ, loc, mtim FROM DT , SL , ST WHERE SL.lid = DT.lid AND ST.sid = DT.sid AND mtim >= '2018-12-01 03:00:00+00' AND mtim <= '2018-12-01 04:00:00+00' AND typ = 'T1' ; <waiting ...>
step s1b: COMMIT;
step s2a: <... completed>
typ|loc|mtim
---+---+----

step s2b: COMMIT;

starting permutation: s1a s2a s2b s1b
step s1a: SELECT count (*) FROM drop_chunks('dt',  '2018-12-25 00:00'::timestamptz);
count
-----
   24

step s2a: SELECT typ, loc, mtim FROM DT , SL , ST WHERE SL.lid = DT.lid AND ST.sid = DT.sid AND mtim >= '2018-12-01 03:00:00+00' AND mtim <= '2018-12-01 04:00:00+00' AND typ = 'T1' ; <waiting ...>
step s2a: <... completed>
ERROR:  canceling statement due to lock timeout
step s2b: COMMIT;
step s1b: COMMIT;

starting permutation: s2a s1a s1b s2b
step s2a: SELECT typ, loc, mtim FROM DT , SL , ST WHERE SL.lid = DT.lid AND ST.sid = DT.sid AND mtim >= '2018-12-01 03:00:00+00' AND mtim <= '2018-12-01 04:00:00+00' AND typ = 'T1' ;
typ|loc|mtim
---+---+----

step s1a: SELECT count (*) FROM drop_chunks('dt',  '2018-12-25 00:00'::timestamptz); <waiting ...>
step s1a: <... completed>
ERROR:  canceling statement due to lock timeout
step s1b: COMMIT;
step s2b: COMMIT;

starting permutation: s2a s1a s2b s1b
step s2a: SELECT typ, loc, mtim FROM DT , SL , ST WHERE SL.lid = DT.lid AND ST.sid = DT.sid AND mtim >= '2018-12-01 03:00:00+00' AND mtim <= '2018-12-01 04:00:00+00' AND typ = 'T1' ;
typ|loc|mtim
---+---+----

step s1a: SELECT count (*) FROM drop_chunks('dt',  '2018-12-25 00:00'::timestamptz); <waiting ...>
step s2b: COMMIT;
step s1a: <... completed>
count
-----
   24

step s1b: COMMIT;

starting permutation: s2a s2b s1a s1b
step s2a: SELECT typ, loc, mtim FROM DT , SL , ST WHERE SL.lid = DT.lid AND ST.sid = DT.sid AND mtim >= '2018-12-01 03:00:00+00' AND mtim <= '2018-12-01 04:00:00+00' AND typ = 'T1' ;
typ|loc|mtim
---+---+----

step s2b: COMMIT;
step s1a: SELECT count (*) FROM drop_chunks('dt',  '2018-12-25 00:00'::timestamptz);
count
-----
   24

step s1b: COMMIT;
