If you just want to ignore crash recovery altogether, you can do that by turning off the fsync parameter. This makes the value for wal_sync_method irrelevant, because the server won't be doing any WAL sync calls anymore.
It is important to recognize that if you have any sort of server crash when fsync is disabled, it is likely your database will be corrupted and no longer start afterward. Despite this being a terrible situation to be running a database under, the performance speedup of turning crash recovery off is so large that you might come across suggestions you disable fsync anyway. You should be equally hesitant to trust any other advice you receive from sources suggesting this, as it is an unambiguously dangerous setting to disable. ...
