I have a postgresql 7.4.8-server with 4 GB ram. > #max_fsm_pages = 20000 # min max_fsm_relations*16, 6 bytes each > #max_fsm_relations = 1000 # min 100, ~50 bytes each
If you do a vacuum verbose (when it's convenient) the last couple of lines will tell you something like this: INFO: free space map: 143 relations, 62034 pages stored; 63792 total pages needed DETAIL: Allocated FSM size: 300 relations + 75000 pages = 473 kB shared memory. It says 143 relations and 63792 total pages needed, so I up'ed my values to these settings: max_fsm_relations = 300 # min 10, fsm is free space map, ~40 bytes max_fsm_pages = 75000 # min 1000, fsm is free space map, ~6 bytes > #effective_cache_size = 1000 # typically 8KB each This is computed by sysctl -n vfs.hibufspace / 8192 (on FreeBSD). So I changed it to: effective_cache_size = 27462 # typically 8KB each Bear in mind that this is 7.4.8 and FreeBSD so these suggestions may not apply to your environment. These suggestions could be validated by the other members of this list. regards Claus ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
