Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
> When a table has been CLUSTERed on a particular index AND that index
> values is monotonically increasing, then it would be a bad move to use
> blocks from the FSM since this would tend to destroy the natural
> clustering sequence.
By the time there are any blocks in FSM to take, the original clean
index page sequence is doubtless history. The pure-increasing-key
scenario you are thinking of never will have any FSM entries, so it's
moot.
regards, tom lane