diff --git a/synapse/http/request_metrics.py b/synapse/http/request_metrics.py
index 8c850bf23f..f1e9b41fde 100644
--- a/synapse/http/request_metrics.py
+++ b/synapse/http/request_metrics.py
@@ -98,14 +98,76 @@ response_size = metrics.register_counter(
"response_size", labels=["method", "servlet", "tag"]
)
+# In flight metrics are incremented while the requests are in flight, rather
+# than when the response was written.
+
+in_flight_requests_ru_utime = metrics.register_counter(
+ "in_flight_requests_ru_utime_seconds", labels=["method", "servlet"],
+)
+
+in_flight_requests_ru_stime = metrics.register_counter(
+ "in_flight_requests_ru_stime_seconds", labels=["method", "servlet"],
+)
+
+in_flight_requests_db_txn_count = metrics.register_counter(
+ "in_flight_requests_db_txn_count", labels=["method", "servlet"],
+)
+
+# seconds spent waiting for db txns, excluding scheduling time, when processing
+# this request
+in_flight_requests_db_txn_duration = metrics.register_counter(
+ "in_flight_requests_db_txn_duration_seconds", labels=["method", "servlet"],
+)
+
+# seconds spent waiting for a db connection, when processing this request
+in_flight_requests_db_sched_duration = metrics.register_counter(
+ "in_flight_requests_db_sched_duration_seconds", labels=["method", "servlet"]
+)
+
+_in_flight_requests_count = metrics.register_gauge(
+ "in_flight_requests_count", labels=["method", "servlet"]
+)
+
+
+# The set of all in flight requests.
+_in_flight_requests = set()
+
+
+def _collect_in_flight():
+ """Called just before metrics are collected, so we use it to update all
+ the in flight request metrics
+ """
+
+ # Map from (method, name) -> int, the number of in flight requests of that
+ # type
+ counts = {}
+
+ for rm in _in_flight_requests:
+ rm.update_metrics()
+ key = (rm.method, rm.name,)
+ counts[key] = counts.get(key, 0) + 1
+
+ for (method, name), count in counts.iteritems():
+ _in_flight_requests_count.set(count, method, name)
+
+
+metrics.register_collector(_collect_in_flight)
+
class RequestMetrics(object):
- def start(self, time_msec, name):
+ def start(self, time_msec, name, method):
self.start = time_msec
self.start_context = LoggingContext.current_context()
self.name = name
+ self.method = method
+
+ self._request_stats = _RequestStats.from_context(self.start_context)
+
+ _in_flight_requests.add(self)
def stop(self, time_msec, request):
+ _in_flight_requests.discard(self)
+
context = LoggingContext.current_context()
tag = ""
@@ -147,3 +209,91 @@ class RequestMetrics(object):
)
response_size.inc_by(request.sentLength, request.method, self.name, tag)
+
+ # We always call this at the end to ensure that we update the metrics
+ # regardless of whether a call to /metrics while the request was in
+ # flight.
+ self.update_metrics()
+
+ def update_metrics(self):
+ """Updates the in flight metrics with values from this request.
+ """
+
+ diff = self._request_stats.update()
+
+ in_flight_requests_ru_utime.inc_by(
+ diff.ru_utime, self.method, self.name,
+ )
+
+ in_flight_requests_ru_stime.inc_by(
+ diff.ru_stime, self.method, self.name,
+ )
+
+ in_flight_requests_db_txn_count.inc_by(
+ diff.db_txn_count, self.method, self.name,
+ )
+
+ in_flight_requests_db_txn_duration.inc_by(
+ diff.db_txn_duration_ms / 1000., self.method, self.name,
+ )
+
+ in_flight_requests_db_sched_duration.inc_by(
+ diff.db_sched_duration_ms / 1000., self.method, self.name,
+ )
+
+
+class _RequestStats(object):
+ """Keeps tracks of various metrics for an in flight request.
+ """
+
+ __slots__ = [
+ "context", "ru_utime", "ru_stime",
+ "db_txn_count", "db_txn_duration_ms", "db_sched_duration_ms",
+ ]
+
+ def __init__(self, context, ru_utime, ru_stime, db_txn_count,
+ db_txn_duration_ms, db_sched_duration_ms):
+ self.context = context
+ self.ru_utime = ru_utime
+ self.ru_stime = ru_stime
+ self.db_txn_count = db_txn_count
+ self.db_txn_duration_ms = db_txn_duration_ms
+ self.db_sched_duration_ms = db_sched_duration_ms
+
+ @staticmethod
+ def from_context(context):
+ ru_utime, ru_stime = context.get_resource_usage()
+
+ return _RequestStats(
+ context,
+ ru_utime, ru_stime,
+ context.db_txn_count,
+ context.db_txn_duration_ms,
+ context.db_sched_duration_ms,
+ )
+
+ def update(self):
+ """Updates the current values and returns the difference between the
+ old and new values.
+
+ Returns:
+ _RequestStats: The difference between the old and new values
+ """
+ new = _RequestStats.from_context(self.context)
+
+ diff = _RequestStats(
+ self.context,
+ new.ru_utime - self.ru_utime,
+ new.ru_stime - self.ru_stime,
+ new.db_txn_count - self.db_txn_count,
+ new.db_txn_duration_ms - self.db_txn_duration_ms,
+ new.db_sched_duration_ms - self.db_sched_duration_ms,
+ )
+
+ self.ru_utime = new.ru_utime
+ self.ru_stime = new.ru_stime
+ self.db_txn_count = new.db_txn_count
+ self.db_txn_duration_ms = new.db_txn_duration_ms
+ self.db_sched_duration_ms = new.db_sched_duration_ms
+
+ return diff
diff --git a/synapse/http/site.py b/synapse/http/site.py
index 202a990508..b608504225 100644
--- a/synapse/http/site.py
+++ b/synapse/http/site.py
@@ -85,7 +85,9 @@ class SynapseRequest(Request):
def _started_processing(self, servlet_name):
self.start_time = int(time.time() * 1000)
self.request_metrics = RequestMetrics()
- self.request_metrics.start(self.start_time, name=servlet_name)
+ self.request_metrics.start(
+ self.start_time, name=servlet_name, method=self.method,
+ )
self.site.access_logger.info(
"%s - %s - Received request: %s %s",
|
