Re: Abnormal storage consumption with autovacuum enabled

> What do you have max_fsm_pages set to?

Currently, max_fsm_pages=20000

Running VACUUM VERBOSE reports:
  NOTICE:  number of page slots needed (237312) exceeds max_fsm_pages (20000)
  HINT:  Consider increasing the configuration parameter "max_fsm_pages" to a value over 237312.

Is this measurement reliable?
We are considering to set:   max_fsm_pages=400000
Could this have some sort of impact?

thanks