anchor.diff:  
   # - Settings -
   
  -#wal_level = minimal			# minimal, archive, or hot_standby
  +wal_level = hot_standby			# minimal, archive, or hot_standby
   					# (change requires restart)
   #fsync = on				# turns forced synchronization on or off
   #synchronous_commit = on		# synchronization level;
  
positive.code: # These are only used if logging_collector is on:
  log_directory = 'pg_log'		# directory where log files are written,
  					# can be absolute or relative to PGDATA
  log_filename = 'postgresql-%a.log'	# log file name pattern,
  					# can include strftime() escapes
  #log_file_mode = 0600			# creation mode for log files,
  					# begin with 0 to use octal notation
  
negative.code: #log_duration = off
  #log_error_verbosity = default		# terse, default, or verbose messages
  #log_hostname = off
  log_line_prefix = '[%t] %u/%d %p: '			# special values:
  					#   %a = application name
  					#   %u = user name
  					#   %d = database name
  