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 ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster