diff --git a/rhodecode/lib/rc_beaker.py b/rhodecode/lib/rc_beaker.py
--- a/rhodecode/lib/rc_beaker.py
+++ b/rhodecode/lib/rc_beaker.py
@@ -3,11 +3,10 @@
 # License: BSD-derived (http://www.repoze.org/LICENSE.txt)
 # With Patches from RhodeCode GmBH
 
-
 import os
 
 from beaker import cache
-from beaker.session import SessionObject
+from beaker.session import SessionObject, Session
 from beaker.util import coerce_cache_params
 from beaker.util import coerce_session_params
 
@@ -18,6 +17,11 @@ from zope.interface import implementer
 from binascii import hexlify
 
 
+
+class CustomSession(Session):
+    pass
+
+
 def BeakerSessionFactoryConfig(**options):
     """ Return a Pyramid session factory using Beaker session settings
     supplied directly as ``**options``"""
@@ -26,8 +30,11 @@ def BeakerSessionFactoryConfig(**options
         _options = options
         _cookie_on_exception = _options.pop('cookie_on_exception', True)
         _constant_csrf_token = _options.pop('constant_csrf_token', False)
+        _sa_opts = _options.pop('sa_opts', {})
 
         def __init__(self, request):
+            self._options['session_class'] = CustomSession
+            self._options['sa_opts'] = self._sa_opts
             SessionObject.__init__(self, request.environ, **self._options)
 
             def session_callback(_request, _response):
@@ -93,12 +100,12 @@ def BeakerSessionFactoryConfig(**options
 
         # Flash API methods
         def flash(self, msg, queue='', allow_duplicate=True):
-            storage = self.setdefault('_f_' + queue, [])
+            storage = self.setdefault(f'_f_{queue}', [])
             if allow_duplicate or (msg not in storage):
                 storage.append(msg)
 
         def pop_flash(self, queue=''):
-            storage = self.pop('_f_' + queue, [])
+            storage = self.pop(f'_f_{queue}', [])
             return storage
 
         def peek_flash(self, queue=''):
@@ -140,6 +147,10 @@ def session_factory_from_settings(settin
     prefixes = ('session.', 'beaker.session.')
     options = {}
 
+    # custom gather of our specific sqlalchemy session db configuration we need to translate this into a single entry
+    # dict because this is how beaker expects that.
+    sa_opts = {}
+
     # Pull out any config args meant for beaker session. if there are any
     for k, v in settings.items():
         for prefix in prefixes:
@@ -147,9 +158,12 @@ def session_factory_from_settings(settin
                 option_name = k[len(prefix):]
                 if option_name == 'cookie_on_exception':
                     v = asbool(v)
+                if option_name.startswith('sa.'):
+                    sa_opts[option_name] = v
                 options[option_name] = v
 
     options = coerce_session_params(options)
+    options['sa_opts'] = sa_opts
     return BeakerSessionFactoryConfig(**options)