added a separate set of memcaches for the render cache

r2/example.ini

@@ -14,6 +14,7 @@ log_path   =
 
 memcaches = 127.0.0.1:11211
 permacaches = 127.0.0.1:11211
+rendercaches = 127.0.0.1:11211
 rec_cache = 127.0.0.1:11311
 tracker_url = 
 adtracker_url = 

r2/r2/lib/app_globals.py

@@ -57,6 +57,7 @@ class Globals(object):
     tuple_props = ['memcaches',
                    'rec_cache',
                    'permacaches',
+                   'rendercaches',
                    'admins',
                    'sponsors',
                    'monitored_servers',
@@ -112,6 +113,7 @@ class Globals(object):
         mc = Memcache(self.memcaches)
         self.cache = CacheChain((LocalCache(), mc))
         self.permacache = Memcache(self.permacaches)
+        self.rendercache = Memcache(self.rendercaches)
         self.make_lock = make_lock_factory(mc)
 
         self.rec_cache = Memcache(self.rec_cache)

r2/r2/models/listing.py

@@ -72,7 +72,7 @@ class Listing(object):
                 r[i] = item.render()
             return r
 
-        rendered_items = sgm(cache, fullnames, render_items, 'render_',
+        rendered_items = sgm(g.rendercache, fullnames, render_items, 'render_',
                              time = g.page_cache_time)
 
         #replace the render function