$ chlift seed --events 8000000
seeded entity tables
seeded user_events
seeded request_logs
seeded system_logs
seeded indexes
seeded analyze
$ psql -c "SELECT relname, n_live_tup FROM pg_stat_user_tables ORDER BY 1"
   relname    | n_live_tup 
--------------+------------
 accounts     |        500
 request_logs |    3999979
 system_logs  |    2000000
 user_events  |    8000032
 users        |      20000
(5 rows)

$ psql -c "SELECT pg_size_pretty(pg_database_size(current_database()))"
 pg_size_pretty 
----------------
 2616 MB
(1 row)