diff --git a/synapse/metrics/__init__.py b/synapse/metrics/__init__.py
new file mode 100644
index 0000000000..125845eb30
--- /dev/null
+++ b/synapse/metrics/__init__.py
@@ -0,0 +1,69 @@
+# -*- coding: utf-8 -*-
+# Copyright 2015 OpenMarket Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from .metric import CounterMetric
+
+
+# We'll keep all the available metrics in a single toplevel dict, one shared
+# for the entire process. We don't currently support per-HomeServer instances
+# of metrics, because in practice any one python VM will host only one
+# HomeServer anyway. This makes a lot of implementation neater
+all_metrics = {}
+
+
+class Metrics(object):
+ """ A single Metrics object gives a (mutable) slice view of the all_metrics
+ dict, allowing callers to easily register new metrics that are namespaced
+ nicely."""
+
+ def __init__(self, name):
+ self.name_prefix = name
+
+ def _register(self, metric):
+ all_metrics[metric.name] = metric
+
+ def register_counter(self, name, *args, **kwargs):
+ full_name = "%s.%s" % (self.name_prefix, name)
+
+ metric = CounterMetric(full_name, *args, **kwargs)
+
+ self._register(metric)
+
+ return metric
+
+ def counted(self, func):
+ """ A method decorator that registers a counter, to count invocations
+ of this method. """
+ counter = self.register_counter(func.__name__)
+
+ def wrapped(*args, **kwargs):
+ counter.inc()
+ return func(*args, **kwargs)
+ return wrapped
+
+
+def get_metrics_for(name):
+ """ Returns a Metrics instance for conveniently creating metrics
+ namespaced with the given name prefix. """
+ return Metrics(name)
+
+
+def render_all():
+ strs = []
+
+ for name in sorted(all_metrics.keys()):
+ strs += all_metrics[name].render()
+
+ return "\n".join(strs)
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