This has been saved for the 8.4 release:
http://momjian.postgresql.org/cgi-bin/pgpatches_hold
---------------------------------------------------------------------------
Heikki Linnakangas wrote:
> We have these GUC variables that define a fraction of something:
>
> #autovacuum_vacuum_scale_factor = 0.2 # fraction of rel size before
> # vacuum
> #autovacuum_analyze_scale_factor = 0.1 # fraction of rel size before
> # analyze
>
> #bgwriter_lru_percent = 1.0 # 0-100% of LRU buffers scanned/round
> #bgwriter_all_percent = 0.333 # 0-100% of all buffers scanned/round
>
> Autovacuum settings use fractions, and bgwriter settings use a
> percentage. Fortunately these settings are not related so there's not
> too much potential for confusion, but it seems we should have a common
> way to define settings like that.
>
> A nice way would be that the base unit would be a fraction, like in the
> autovacuum settings, but you could add a %-sign to give it as a percent,
> just like you can use KB/MB etc. I'm not sure if we can do anything for
> those without breaking backwards-compatibility, though.
>
> Any ideas? The load distributed checkpoints patch adds one more GUC
> variable like. I'm inclined to follow the example of the bgwriter
> settings because it's more closely related to them, though I like the
> autovacuum style more.
>
> --
> Heikki Linnakangas
> EnterpriseDB http://www.enterprisedb.com
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Have you searched our list archives?
>
> http://archives.postgresql.org
-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://www.enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +
