On Sat, May 22, 2021 at 03:35:13PM -0700, Peter Geoghegan wrote: > On Thu, May 20, 2021 at 4:54 PM Bruce Momjian <br...@momjian.us> wrote: > > 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. > > Fair enough. > > I noticed something about the same item that needs to be fixed, > though. The vacuum_cost_page_miss GUC does not directly represent any > kind of time-based delay, but the current wording says that it uses > millisecond units. In fact the vacuum_cost_page_miss GUC is based on > abstract cost units, apportioned from vacuum_cost_limit. I suggested > that the wording talk about relative cost differences in part because > that's just how the GUC works, in general.
OK, thanks. Here is the updated text: <listitem> <!-- Author: Peter Geoghegan <p...@bowt.ie> 2021-01-27 [e19594c5c] Reduce the default value of vacuum_cost_page_miss. --> <para> Reduce the default value of <xref linkend="guc-vacuum-cost-page-miss"/> to better reflects current hardware capabilities (Peter Geoghegan) </para> </listitem> -- Bruce Momjian <br...@momjian.us> https://momjian.us EDB https://enterprisedb.com If only the physical world exists, free will is an illusion.