diff -urN synapse/util/caches/descriptors.py /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/descriptors.py
--- synapse/util/caches/descriptors.py	2016-02-13 12:48:45.514736907 +0100
+++ /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/descriptors.py	2016-02-15 12:55:01.153097787 +0100
@@ -40,7 +40,8 @@
 
 class Cache(object):
 
-    def __init__(self, name, max_entries=1000, keylen=1, lru=True, tree=False):
+    def __init__(self, name, max_entries=50, keylen=1, lru=True, tree=False):
+	max_entries = 5
         if lru:
             cache_type = TreeCache if tree else dict
             self.cache = LruCache(
@@ -138,7 +139,7 @@
     which can be used to insert values into the cache specifically, without
     calling the calculation function.
     """
-    def __init__(self, orig, max_entries=1000, num_args=1, lru=True, tree=False,
+    def __init__(self, orig, max_entries=50, num_args=1, lru=True, tree=False,
                  inlineCallbacks=False):
         self.orig = orig
 
@@ -343,7 +344,7 @@
         return wrapped
 
 
-def cached(max_entries=1000, num_args=1, lru=True, tree=False):
+def cached(max_entries=50, num_args=1, lru=True, tree=False):
     return lambda orig: CacheDescriptor(
         orig,
         max_entries=max_entries,
@@ -353,7 +354,7 @@
     )
 
 
-def cachedInlineCallbacks(max_entries=1000, num_args=1, lru=False, tree=False):
+def cachedInlineCallbacks(max_entries=50, num_args=1, lru=False, tree=False):
     return lambda orig: CacheDescriptor(
         orig,
         max_entries=max_entries,
Binary files synapse/util/caches/descriptors.pyc and /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/descriptors.pyc differ
diff -urN synapse/util/caches/dictionary_cache.py /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/dictionary_cache.py
--- synapse/util/caches/dictionary_cache.py	2016-02-13 12:48:45.514736907 +0100
+++ /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/dictionary_cache.py	2016-02-15 12:55:09.165064478 +0100
@@ -31,7 +31,8 @@
     fetching a subset of dictionary keys for a particular key.
     """
 
-    def __init__(self, name, max_entries=1000):
+    def __init__(self, name, max_entries=50):
+	max_entries = 5
         self.cache = LruCache(max_size=max_entries)
 
         self.name = name
Binary files synapse/util/caches/dictionary_cache.pyc and /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/dictionary_cache.pyc differ
diff -urN synapse/util/caches/expiringcache.py /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/expiringcache.py
--- synapse/util/caches/expiringcache.py	2016-02-13 12:48:45.514736907 +0100
+++ /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/expiringcache.py	2016-02-15 12:55:25.948994696 +0100
@@ -36,6 +36,7 @@
                 an item on access. Defaults to False.
 
         """
+	max_len = 5
         self._cache_name = cache_name
 
         self._clock = clock
Binary files synapse/util/caches/expiringcache.pyc and /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/expiringcache.pyc differ
Binary files synapse/util/caches/__init__.pyc and /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/__init__.pyc differ
diff -urN synapse/util/caches/lrucache.py /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/lrucache.py
--- synapse/util/caches/lrucache.py	2016-02-13 12:48:45.514736907 +0100
+++ /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/lrucache.py	2016-02-15 12:55:39.392938797 +0100
@@ -36,6 +36,7 @@
     If cache_type=TreeCache, all keys must be tuples.
     """
     def __init__(self, max_size, keylen=1, cache_type=dict):
+	max_size = 5
         cache = cache_type()
         self.cache = cache  # Used for introspection.
         list_root = []
Binary files synapse/util/caches/lrucache.pyc and /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/lrucache.pyc differ
Binary files synapse/util/caches/snapshot_cache.pyc and /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/snapshot_cache.pyc differ
diff -urN synapse/util/caches/stream_change_cache.py /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/stream_change_cache.py
--- synapse/util/caches/stream_change_cache.py	2016-02-13 12:48:45.514736907 +0100
+++ /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/stream_change_cache.py	2016-02-15 12:55:55.840870403 +0100
@@ -32,7 +32,8 @@
     entities that may have changed since that position. If position key is too
     old then the cache will simply return all given entities.
     """
-    def __init__(self, name, current_stream_pos, max_size=10000, prefilled_cache={}):
+    def __init__(self, name, current_stream_pos, max_size=50, prefilled_cache={}):
+	max_size = 5
         self._max_size = max_size
         self._entity_to_key = {}
         self._cache = sorteddict()
Binary files synapse/util/caches/stream_change_cache.pyc and /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/stream_change_cache.pyc differ
Binary files synapse/util/caches/treecache.pyc and /var/lib/lxc/synapse/rootfs/usr/local/lib/python2.7/dist-packages/synapse/util/caches/treecache.pyc differ