Hi Antonin,
> I think that the most important thing for the user to know is that the purpose
> of REPACK is to improve performance (via bloat removal and/or clustering),
> whereas "failsafe VACUUM" (i.e. VACUUM with INDEX_CLEANUP set to off) should
> be used to avoid the risk of XID wraparound.
>
> I don't have a good idea about the wording right now.
Here is a try with Fable, as v2 of Radim's patch.
It adds a paragraph to Notes. REPACK is for bloat and clustering. For
wraparound uses VACUUM, because REPACK takes much longer and can fail
late.
Thanks,
Shihao
