On Thu, May 20, 2021 at 04:19:50PM -0700, Peter Geoghegan wrote:
> On Thu, May 20, 2021 at 2:37 PM Bruce Momjian <bruce@momjian.us> wrote:
> > I went with this text:
> >
> > Reduce the default value of <varname><xref
> > linkend="guc-vacuum-cost-page-miss"></varname> from 10 milliseconds to 2
> > (Peter Geoghegan)
> >
> > I think with numbers, and the fact we are saying "decrease" havint them
> > in the from/to order is best. If this was non-numeric, like to scram
> > from md5, it would make more sense to use to/from.
>
> The point of this change was to make the cost of dirtying pages much
> higher than everything else, since writes are in effect much more
> expensive on modern hardware. Don't know if you need to say that.
I think our text "This new default better reflects current hardware
capabilities." is detailed enough. People can dig into the item to see
what it does and how it adjusts costs.
--
Bruce Momjian <bruce@momjian.us> https://momjian.us
EDB https://enterprisedb.com
If only the physical world exists, free will is an illusion.