Обсуждение: Warning on certain configuration file changes

I have developed a patch that writes a warning in the server log when a user 
changes a restart-only parameter in the configuration file and does a reload.  
The problem is that you will see this warning once for each running server 
process (unless you sent the HUP signal only to a specific process).  Do 
people feel that the warning should only be written once by the postmaster 
process?

Peter Eisentraut <peter_e@gmx.net> writes:
> I have developed a patch that writes a warning in the server log when a user 
> changes a restart-only parameter in the configuration file and does a reload.
> The problem is that you will see this warning once for each running server 
> process (unless you sent the HUP signal only to a specific process).  Do 
> people feel that the warning should only be written once by the postmaster 
> process?

Yes.  There is precedent already, see the existing code in
ProcessConfigFile:
       /*        * To avoid cluttering the log, only the postmaster bleats loudly        * about problems with the
configfile.        */       elevel = IsUnderPostmaster ? DEBUG2 : LOG;
 
        regards, tom lane