On Wed, 7 Feb 2024 at 10:00, Joel Jacobson <joel@compiler.org> wrote:
On Fri, Sep 8, 2023, at 16:17, Gabriele Bartolini wrote: > ``` > postgres=# ALTER SYSTEM SET wal_level TO minimal; > ERROR: could not open file "postgresql.auto.conf": Permission denied > ```
+1 to simply mark postgresql.auto.conf file as not being writeable.
To improve the UX experience, how about first checking if the file is not writeable, or catch EACCESS, and add a user-friendly hint?
``` postgres=# ALTER SYSTEM SET wal_level TO minimal; ERROR: could not open file "postgresql.auto.conf": Permission denied HINT: The ALTER SYSTEM command is effectively disabled as the configuration file is set to read-only. ```
This would do - provided we fix the issue with pg_rewind not handling read-only files in PGDATA.
