当 wal_level 设置为最小时，postgres 11.4 无法启动

Question

I have migrated my data by dumping and reloading it from pg9.3 to pg11.4 which went fine. And I am able to run the new server with default config

The pg11.4 works fine but it fails to restart when I set in postgres.conf to

wal_level = minimal

This same setting works in my 9.3 instance but not in 11.4

Is there any config setting that could conflict with wal_level = minimal ?

Answer 1

It is no problem to start PostgreSQL v11 with wal_level=minimal unless there is another configuration setting that conflicts with it. For example, archive_mode cannot be on .

Look into the PostgreSQL log file for the error message, or start PostgreSQL manually with

pg_ctl start -D datadir

to see the message that will tell you the exact reason why the server failed to start.