diff --git a/configs/development.ini b/configs/development.ini
--- a/configs/development.ini
+++ b/configs/development.ini
@@ -453,8 +453,8 @@ rc_cache.cache_repo.expiration_time = 25
 ; ##############
 
 ; beaker.session.type is type of storage options for the logged users sessions. Current allowed
-; types are file, ext:redis, ext:database, ext:memcached, and memory (default if not specified).
-; Fastest ones are Redis and ext:database
+; types are file, ext:redis, ext:database, ext:memcached
+; Fastest ones are ext:redis and ext:database, DO NOT use memory type for session
 beaker.session.type = file
 beaker.session.data_dir = %(here)s/data/sessions
 
diff --git a/configs/production.ini b/configs/production.ini
--- a/configs/production.ini
+++ b/configs/production.ini
@@ -403,8 +403,8 @@ rc_cache.cache_repo.expiration_time = 25
 ; ##############
 
 ; beaker.session.type is type of storage options for the logged users sessions. Current allowed
-; types are file, ext:redis, ext:database, ext:memcached, and memory (default if not specified).
-; Fastest ones are Redis and ext:database
+; types are file, ext:redis, ext:database, ext:memcached
+; Fastest ones are ext:redis and ext:database, DO NOT use memory type for session
 beaker.session.type = file
 beaker.session.data_dir = %(here)s/data/sessions