| Type: | integer |
| Default: | 30 (30s) |
| Min: | 0 (0s) |
| Max: | 2147483647 (2147483647s) |
| Unit: | seconds (s) |
| Context: | sighup |
| Restart: | false |
Write a message to the server log if checkpoints caused by the filling of WAL segment files happen closer together than this many seconds (which suggests that max_wal_size ought to be raised). The default is 30 seconds (30s). Zero disables the warning. No warnings will be generated if checkpoint_timeout is less than checkpoint_warning. This parameter can only be set in the postgresql.conf file or on the server command line.