Re: RFC: Add 'taint' field to pg_control.

On 2/28/18 16:43, Andres Freund wrote:
> a significant number of times during investigations of bugs I wondered
> whether running the cluster with various settings, or various tools
> could've caused the issue at hand. Therefore I'd like to propose adding
> a 'tainted' field to pg_control, that contains some of the "history" of
> the cluster. Individual bits inside that field that I can think of right
> now are:
> - pg_resetxlog was used non-passively on cluster
> - ran with fsync=off
> - ran with full_page_writes=off
> - pg_upgrade was used

I can see why you'd want that, but as a DBA, I don't necessarily want
all of that recorded, especially in a quasi-permanent way.

Maybe this could be stored in a separate location, like a small
text/log-like file in the data directory. Then DBAs can save or keep or
remove that information as they wish.

--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services