Re: compute_query_id and pg_stat_statements

On Fri, May 14, 2021 at 08:35:14AM -0400, Bruce Momjian wrote:
> On Thu, May 13, 2021 at 09:41:42PM -0400, Bruce Momjian wrote:
> > I think if we keep the output as 'auto', and document that you check
> > pg_stat_activity for a hash to see if it is enabled, that gets us pretty
> > far.
> 
> I think keeping the output as 'auto', and documenting that this query
> must be run to determine if the query id is being computed:
> 
>     SELECT query_id
>     FROM pg_stat_activity
>     WHERE pid = pg_backend_pid();
> 
> is the right approach.

Actually, we talked about huge_pages = try needing to use OS commands to
see if huge pages are being used, so requiring an SQL query to see if
query id is being computed seems reasonable.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

  If only the physical world exists, free will is an illusion.