diff --git a/synapse/util/metrics.py b/synapse/util/metrics.py
new file mode 100644
index 0000000000..daf6087fe0
--- /dev/null
+++ b/synapse/util/metrics.py
@@ -0,0 +1,86 @@
+# -*- coding: utf-8 -*-
+# Copyright 2016 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 synapse.util.logcontext import LoggingContext
+import synapse.metrics
+
+import logging
+
+
+logger = logging.getLogger(__name__)
+
+
+metrics = synapse.metrics.get_metrics_for(__name__)
+
+block_timer = metrics.register_distribution(
+ "block_timer",
+ labels=["block_name"]
+)
+
+block_ru_utime = metrics.register_distribution(
+ "block_ru_utime", labels=["block_name"]
+)
+
+block_ru_stime = metrics.register_distribution(
+ "block_ru_stime", labels=["block_name"]
+)
+
+block_db_txn_count = metrics.register_distribution(
+ "block_db_txn_count", labels=["block_name"]
+)
+
+block_db_txn_duration = metrics.register_distribution(
+ "block_db_txn_duration", labels=["block_name"]
+)
+
+
+class Measure(object):
+ __slots__ = ["clock", "name", "start_context", "start"]
+
+ def __init__(self, clock, name):
+ self.clock = clock
+ self.name = name
+ self.start_context = None
+ self.start = None
+
+ def __enter__(self):
+ self.start = self.clock.time_msec()
+ self.start_context = LoggingContext.current_context()
+
+ def __exit__(self, exc_type, exc_val, exc_tb):
+ if exc_type is not None:
+ return
+
+ duration = self.clock.time_msec() - self.start
+ block_timer.inc_by(duration, self.name)
+
+ context = LoggingContext.current_context()
+ if not context:
+ return
+
+ if context != self.start_context:
+ logger.warn(
+ "Context have unexpectedly changed %r, %r",
+ context, self.start_context
+ )
+ return
+
+ ru_utime, ru_stime = context.get_resource_usage()
+
+ block_ru_utime.inc_by(ru_utime, self.name)
+ block_ru_stime.inc_by(ru_stime, self.name)
+ block_db_txn_count.inc_by(context.db_txn_count, self.name)
+ block_db_txn_duration.inc_by(context.db_txn_duration, self.name)
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