> Why not keep it simple with
>
> "If a table has any indexes, this will happen at least once per vacuum,
>
> after the heap has been completely scanned. It may happen multiple times per
>
> vacuum if maintenance_work_mem (or, in the case of autovacuum,
>
> autovacuum_work_mem) is insufficient to store the number of dead
>
> tuples found."
Thank you Laurenz,
Yes that reads better still.
Regards,
Nikolai