anchor.diff:  
   
   #------------------------------------------------------------------------------
  +<% if node['postgresql']['version'].to_f >= 9.1 -%>
  +# ERROR HANDLING
  +#------------------------------------------------------------------------------
  +
  +#exit_on_error = off				# terminate session on any error?
  +#restart_after_crash = on			# reinitialize after backend crash?
  +
  +
  +#------------------------------------------------------------------------------
  +<% end -%>
   # CUSTOMIZED OPTIONS
   #------------------------------------------------------------------------------
   
  
positive.code: # - Memory -
  
  <% if @shared_buffers -%>shared_buffers = <%= @shared_buffers %>
  <% end %>#shared_buffers = 4096			# min 128kB
  					# (change requires restart)
  #temp_buffers = 8MB			# min 800kB
  <% if node['postgresql']['version'].to_f < 8.4 -%>
  
negative.code: #check_function_bodies = on
  #default_transaction_isolation = 'read committed'
  #default_transaction_read_only = off
  <% if node['postgresql']['version'].to_f >= 9.1 -%>
  #default_transaction_deferrable = off
  <% end -%>
  #session_replication_role = 'origin'
  #statement_timeout = 0			# in milliseconds, 0 is disabled
  #vacuum_freeze_min_age = 50000000
  <% if node['postgresql']['version'].to_f >= 8.4 -%>
  #vacuum_freeze_table_age = 150000000
  <% end -%>
  <% if node['postgresql']['version'].to_f >= 9.0 -%>
  #bytea_output = 'hex'			# hex, escape
  <% end -%>
  #xmlbinary = 'base64'
  #xmloption = 'content'
  
  # - Locale and Formatting -
  
  <% if @datestyle -%>datestyle = '<%= @datestyle %>'<% else %>datestyle = 'iso, mdy'<% end %>
  <% if node['postgresql']['version'].to_f >= 8.4 -%>
  #intervalstyle = 'postgres'
  <% end -%>
  
  <% if node['postgresql']['version'].to_f < 9.1 -%>
  #timezone = unknown			# actually, defaults to TZ environment
  					# setting
  <% else -%>
  #timezone = '(defaults to server environment setting)'
  <% end -%>
  #timezone_abbreviations = 'Default'     # Select the set of available time zone
  					# abbreviations.  Currently, there are
  					#   Default
  