anchor.diff:  #log_duration = off
   #log_error_verbosity = default		# terse, default, or verbose messages
   #log_hostname = off
  -log_line_prefix = '< %m >'			# special values:
  +log_line_prefix = '[%t] %u/%d %p: '			# special values:
   					#   %a = application name
   					#   %u = user name
   					#   %d = database name
  
positive.code: 
  #max_files_per_process = 1000		# min 25
  					# (change requires restart)
  #shared_preload_libraries = ''		# (change requires restart)
  
  # - Cost-Based Vacuum Delay -
  
  
negative.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-%d.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
  