Tom Lane wrote:
> "Zeugswetter Andreas SB SD" <ZeugswetterA@spardat.at> writes:
> > I still think, that for best results the vacuums should happen continuously
> > for single pages based on a hook in wal or the buffer manager.
>
> Not possible unless you are willing to have SELECTs grab much stronger
> locks than they do now (viz, the same kind of lock that VACUUM does).
Remember, you can't recycle the page until all transactions are done
seeing it as active. I think something periodic will do the job just
fine.
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