I use streaming replication and PITR (WAL files) in my cluster, currently I have different versions of postgresql.conf for the master and the standby server.
The only difference in the files is the archive command, that points to a different directory.
for example, on master I have:
archive_command = 'cp %p /dbckp/server1master/%f'
And on the standby:
archive_command = 'cp %p /dbckp/server2master/%f'
I figure that if the standby is not generating any archives while on 'standby mode' I could use the same directory and have a single postgresql.conf?