Re: Feature: vacuum page before write

I prefer on demand solution, as it reduces latency and I can order vaccum at
night, when I have free CPU resources. At least auto vaccum on flush should be
configurable.

Kind regards,
Radek

pasman pasmański <pasman(dot)p(at)gmail(dot)com> Saturday 05 February 2011 04:29:37
> Hi.
> I propose new feature.
> Before flushing page of table to disk it may be scanned to reclaim
> deleted rows. And assigned as partially vacuumed or vacuumed.
> It may reduce bloat in frequently updated tables and make normal
> (auto)vacuum faster.
> Additional scan adds overhead to cpu (for update/delete), but seq scan
> will be faster and disk io usage will be lower.
> I don't know what is happen when a index entry points to reclaimed row.