[HACKERS] Clarification in pg10's pgupgrade.html step 10 (upgrading standbyservers)

Hi -hackers.

 

I'm reading https://www.postgresql.org/docs/10/static/pgupgrade.html to try to understand how to upgrade standby-servers using pg_upgrade with pg10.

 

The text in step 10 sais:

"You will not be running pg_upgrade on the standby servers, but rather rsync", which to me sounds like rsync, in step 10-f, should be issued on the standy servers. Is this the case? If so I don't understand how the standby's data is upgraded and what "remote_dir" is. If rsync is supposed to be issued on the primary then I think it should be explicitly mentioned, and step 10-f should provide a clarer example with more detailed values for the directory-structures involved.

 

I really think section 10 needs improvement as I'm certainly not comfortable upgrading standbys following the existing procedure.

 

Thanks.