diff --git a/production.ini b/production.ini
--- a/production.ini
+++ b/production.ini
@@ -46,16 +46,17 @@ port = 8001
 use = egg:rhodecode
 full_stack = true
 static_files = true
-lang=en
+lang = en
 cache_dir = %(here)s/data
 index_dir = %(here)s/data/index
-app_instance_uuid = prod1234
+app_instance_uuid = rc-production
 cut_off_limit = 256000
-force_https = false 
+force_https = false
 commit_parse_limit = 50
 use_gravatar = true
 container_auth_enabled = false
 proxypass_auth_enabled = false
+default_encoding = utf8
 
 ## overwrite schema of clone url
 ## available vars:
@@ -86,6 +87,11 @@ issue_server_link = https://myissueserve
 
 issue_prefix = #
 
+## instance-id prefix
+## a prefix key for this instance used for cache invalidation when running 
+## multiple instances of rhodecode, make sure it's globally unique for 
+## all running rhodecode instances. Leave empty if you don't use it
+instance_id = 
 
 ####################################
 ###        CELERY CONFIG        ####
@@ -165,6 +171,7 @@ beaker.cache.sql_cache_long.key_length =
 
 beaker.session.type = file
 beaker.session.key = rhodecode
+# secure cookie requires AES python libraries
 #beaker.session.encrypt_key = g654dcno0-9873jhgfreyu
 #beaker.session.validate_key = 9712sds2212c--zxc123
 beaker.session.timeout = 36000