Just wondering, i ran vacuumdb but didn't get the information that you get about the free space even when i set the verbose option. How did you get that?
I believe it is VACUUM FULL ANALYZE VERBOSE;
At the very end you will get a listing like
INFO: free space map: 167 relations, 423 pages stored; 2912 total pages needed
DETAIL: Allocated FSM size: 1000 relations + 20000 pages = 186 kB shared memory.
(Yes, mine is done on a very static table.)
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