Isn't this backwards?
> If index cleanup is not performed regularly, performance may suffer, because as the table is modified indexes will accumulate dead tuples and the table itself will accumulate dead line pointers that cannot be removed until index cleanup is completed.
Indexes have line pointers, tables have tuples, so it should read:
> If index cleanup is not performed regularly, performance may suffer, because as the table is modified indexes will accumulate dead line pointers and the table itself will accumulate dead tuples that cannot be removed until index cleanup is completed.