Parsed test spec with 3 sessions

starting permutation: r_begin r_alpha w_beta r_alpha r_beta r_commit
step r_begin: BEGIN ISOLATION LEVEL REPEATABLE READ;
step r_alpha: SELECT count(*) AS alpha FROM tdoc WHERE d @@@ 'alpha'::ftsquery;
alpha
-----
  200
(1 row)

step w_beta: INSERT INTO tdoc SELECT g, to_ftsdoc('beta doc ' || g)
                      FROM generate_series(1000, 1049) g;
step r_alpha: SELECT count(*) AS alpha FROM tdoc WHERE d @@@ 'alpha'::ftsquery;
alpha
-----
  200
(1 row)

step r_beta: SELECT count(*) AS beta  FROM tdoc WHERE d @@@ 'beta'::ftsquery;
beta
----
   0
(1 row)

step r_commit: COMMIT;

starting permutation: w_beta f_beta
step w_beta: INSERT INTO tdoc SELECT g, to_ftsdoc('beta doc ' || g)
                      FROM generate_series(1000, 1049) g;
step f_beta: SELECT count(*) AS beta  FROM tdoc WHERE d @@@ 'beta'::ftsquery;
beta
----
  50
(1 row)


starting permutation: r_begin r_alpha w_vacuum r_alpha r_commit
step r_begin: BEGIN ISOLATION LEVEL REPEATABLE READ;
step r_alpha: SELECT count(*) AS alpha FROM tdoc WHERE d @@@ 'alpha'::ftsquery;
alpha
-----
  200
(1 row)

step w_vacuum: VACUUM tdoc;
step r_alpha: SELECT count(*) AS alpha FROM tdoc WHERE d @@@ 'alpha'::ftsquery;
alpha
-----
  200
(1 row)

step r_commit: COMMIT;

starting permutation: r_begin r_alpha w_merge r_alpha r_commit
step r_begin: BEGIN ISOLATION LEVEL REPEATABLE READ;
step r_alpha: SELECT count(*) AS alpha FROM tdoc WHERE d @@@ 'alpha'::ftsquery;
alpha
-----
  200
(1 row)

step w_merge: SELECT fts_merge('tdoc_bm25');
fts_merge
---------
f        
(1 row)

step r_alpha: SELECT count(*) AS alpha FROM tdoc WHERE d @@@ 'alpha'::ftsquery;
alpha
-----
  200
(1 row)

step r_commit: COMMIT;

starting permutation: w_del w_vacuum w_reuse f_alpha f_gamma
step w_del: DELETE FROM tdoc WHERE id <= 100;
step w_vacuum: VACUUM tdoc;
step w_reuse: INSERT INTO tdoc SELECT g, to_ftsdoc('gamma doc ' || g)
                      FROM generate_series(1, 40) g;
step f_alpha: SELECT count(*) AS alpha FROM tdoc WHERE d @@@ 'alpha'::ftsquery;
alpha
-----
  100
(1 row)

step f_gamma: SELECT count(*) AS gamma FROM tdoc WHERE d @@@ 'gamma'::ftsquery;
gamma
-----
   40
(1 row)