diff --git a/server/website/script/fixture_generators/knob_settings/oracle/create_knob_settings.py b/server/website/script/fixture_generators/knob_settings/oracle/create_knob_settings.py
index 6ff303e..3320fdb 100644
--- a/server/website/script/fixture_generators/knob_settings/oracle/create_knob_settings.py
+++ b/server/website/script/fixture_generators/knob_settings/oracle/create_knob_settings.py
@@ -138,6 +138,12 @@ def set_field(fields):
         fields['maxval'] = 2000000000  # 2GB
         fields['default'] = 500000000  # 500M
         fields['resource'] = 1
+    if fields['name'].lower() == 'db_32k_cache_size':
+        fields['tunable'] = False
+        fields['minval'] = 0
+        fields['maxval'] = 2000000000  # 2GB
+        fields['default'] = 500000000  # 500M
+        fields['resource'] = 1
     if fields['name'].upper() == 'DB_RECYCLE_CACHE_SIZE':
         fields['tunable'] = False
         fields['minval'] = 0
diff --git a/server/website/website/fixtures/oracle-121_knobs.json b/server/website/website/fixtures/oracle-121_knobs.json
index 328171c..73d7f87 100644
--- a/server/website/website/fixtures/oracle-121_knobs.json
+++ b/server/website/website/fixtures/oracle-121_knobs.json
@@ -1039,11 +1039,12 @@
             "unit": 3,
             "tunable": false,
             "description": "",
-            "minval": null,
-            "maxval": null,
+            "minval": 0,
+            "maxval": 2000000000,
             "vartype": 2,
-            "default": "0",
-            "summary": "Size of cache for 32K buffers"
+            "default": 500000000,
+            "summary": "Size of cache for 32K buffers",
+            "resource": 1
         }
     },
     {
diff --git a/server/website/website/fixtures/oracle-12_knobs.json b/server/website/website/fixtures/oracle-12_knobs.json
index 1947e1a..7c45a77 100644
--- a/server/website/website/fixtures/oracle-12_knobs.json
+++ b/server/website/website/fixtures/oracle-12_knobs.json
@@ -1324,11 +1324,12 @@
             "unit": 3,
             "tunable": false,
             "description": "",
-            "minval": null,
-            "maxval": null,
+            "minval": 0,
+            "maxval": 2000000000,
             "vartype": 2,
-            "default": "0",
-            "summary": "Size of cache for 32K buffers"
+            "default": 500000000,
+            "summary": "Size of cache for 32K buffers",
+            "resource": 1
         }
     },
     {
diff --git a/server/website/website/fixtures/oracle-19_knobs.json b/server/website/website/fixtures/oracle-19_knobs.json
index 04a843f..a4d8d9f 100644
--- a/server/website/website/fixtures/oracle-19_knobs.json
+++ b/server/website/website/fixtures/oracle-19_knobs.json
@@ -1419,11 +1419,12 @@
             "unit": 3,
             "tunable": false,
             "description": "",
-            "minval": null,
-            "maxval": null,
+            "minval": 0,
+            "maxval": 2000000000,
             "vartype": 2,
-            "default": "0",
-            "summary": "Size of cache for 32K buffers"
+            "default": 500000000,
+            "summary": "Size of cache for 32K buffers",
+            "resource": 1
         }
     },
     {
diff --git a/server/website/website/urls.py b/server/website/website/urls.py
index 7a4c38b..5311fbf 100644
--- a/server/website/website/urls.py
+++ b/server/website/website/urls.py
@@ -74,7 +74,7 @@ urlpatterns = [
     url(r'^create/user/', website_views.alt_create_user, name='backdoor_create_user'),
     url(r'^delete/user/', website_views.alt_delete_user, name='backdoor_delete_user'),
     url(r'^info/(?P<name>[0-9a-zA-Z]+)', website_views.alt_get_info, name="backdoor_info"),
-    url(r'^set_constant/(?P<name>[0-9a-zA-Z_]+)', website_views.alt_set_constant, name="backdoor_set_constant"),
+    url(r'^set_constants/', website_views.alt_set_constants, name="backdoor_set_constants"),
 
     # train ddpg with results in the given session
     url(r'^train_ddpg/sessions/(?P<session_id>[0-9]+)$', website_views.train_ddpg_loops, name='train_ddpg_loops'),
diff --git a/server/website/website/views.py b/server/website/website/views.py
index 219fc5d..3cfcdfb 100644
--- a/server/website/website/views.py
+++ b/server/website/website/views.py
@@ -1141,19 +1141,16 @@ def alt_get_info(request, name):
 
 
 @csrf_exempt
-def alt_set_constant(request, name):
-    # Sets a constant defined in settings/constants.py
-    LOG.info('POST: %s', request.POST)
-    LOG.info('POST.lists(): %s', request.POST.lists())
-    value = request.POST['value']
-    LOG.info('name: %s, value: %s, type: %s', name, value, type(value))
-    #data = {k: v[0] for k, v in request.POST.lists()}
-    try:
-        utils.set_constant(name, value)
-    except AttributeError as e:
-        LOG.warning(e)
-        return HttpResponse(e, status=400)
-    return HttpResponse("Successfully updated {} to '{}'".format(name, value))
+def alt_set_constants(request):
+    constants = JSONUtil.loads(request.POST.get('constants', '{}'))
+    for name, value in constants.items():
+        try:
+            utils.set_constant(name, value)
+        except AttributeError as e:
+            LOG.warning(e)
+            return HttpResponse(e, status=400)
+    return HttpResponse("Successfully updated constants: {}".format(
+        ', '.join('{}={}'.format(k, v) for k, v in constants.items())))
 
 
 @csrf_exempt