text: 
  ----------------------- Free Space Map exhaustion -----------------------
  
  postgres=# VACUUM VERBOSE;
  INFO:  free space map contains 49 pages in 62 relations
  DETAIL:  A total of 992 page slots are in use (including overhead).
  992 page slots are required to track all free space.
  Current limits are:  204800 page slots, 1000 relations, using 1265 kB
  
  postgres=# SHOW max_fsm_pages;
   max_fsm_pages
  ---------------
   204800
  