Re: Automatic adjustment of bgwriter_lru_maxpages

Greg Smith <gsmith(at)gregsmith(dot)com> writes:
> Since the whole background writer setup is kind of complicated, the other
> thing I was working on is writing a guide on how to use the new
> pg_stat_bgwriter information to figure out if you need to increase
> bgwriter_[all|lru]_pages (and the other parameters too). It makes it much
> easier to write that if you can say "You can safely set
> bgwriter_lru_maxpages high because it only writes what it needs to based
> on your usage".

If you can write something like that, why do we need the parameter at all?

regards, tom lane