DROP TABLE IF EXISTS kv;
CREATE TABLE kv(
    id serial primary key,
    key text NOT NULL UNIQUE,
    data text NOT NULL
);
INSERT INTO kv(key, data)
SELECT 'key-'||g.i::text, 'abcdefg'
FROM generate_series(1, 100) g(i);

VACUUM (ANALYZE, VERBOSE, FREEZE) kv;
VACUUM (ANALYZE, VERBOSE) kv;