Warning on certain configuration file changes

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 config file.
*/
elevel = IsUnderPostmaster ? DEBUG2 : LOG;

regards, tom lane