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-rw-r--r--synapse/handlers/sync.py320
-rw-r--r--synapse/handlers/typing.py23
-rw-r--r--synapse/rest/client/v1/admin.py2
-rw-r--r--synapse/rest/client/v1/presence.py4
-rw-r--r--synapse/rest/client/v1/profile.py6
-rw-r--r--synapse/storage/prepare_database.py2
-rw-r--r--synapse/storage/receipts.py19
-rw-r--r--synapse/util/logcontext.py6
-rw-r--r--synapse/util/metrics.py21
9 files changed, 213 insertions, 190 deletions
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py
index 3f1cda5b0b..ddeed27965 100644
--- a/synapse/handlers/sync.py
+++ b/synapse/handlers/sync.py
@@ -19,6 +19,7 @@ from synapse.streams.config import PaginationConfig
 from synapse.api.constants import Membership, EventTypes
 from synapse.util import unwrapFirstError
 from synapse.util.logcontext import LoggingContext, PreserveLoggingContext
+from synapse.util.metrics import Measure
 
 from twisted.internet import defer
 
@@ -178,18 +179,6 @@ class SyncHandler(BaseHandler):
         else:
             return self.incremental_sync_with_gap(sync_config, since_token)
 
-    def last_read_event_id_for_room_and_user(self, room_id, user_id, ephemeral_by_room):
-        if room_id not in ephemeral_by_room:
-            return None
-        for e in ephemeral_by_room[room_id]:
-            if e['type'] != 'm.receipt':
-                continue
-            for receipt_event_id, val in e['content'].items():
-                if 'm.read' in val:
-                    if user_id in val['m.read']:
-                        return receipt_event_id
-        return None
-
     @defer.inlineCallbacks
     def full_state_sync(self, sync_config, timeline_since_token):
         """Get a sync for a client which is starting without any state.
@@ -318,7 +307,6 @@ class SyncHandler(BaseHandler):
             ephemeral_by_room=ephemeral_by_room,
             tags_by_room=tags_by_room,
             account_data_by_room=account_data_by_room,
-            all_ephemeral_by_room=ephemeral_by_room,
             batch=batch,
             full_state=True,
         )
@@ -368,50 +356,51 @@ class SyncHandler(BaseHandler):
             typing events for that room.
         """
 
-        typing_key = since_token.typing_key if since_token else "0"
+        with Measure(self.clock, "ephemeral_by_room"):
+            typing_key = since_token.typing_key if since_token else "0"
 
-        rooms = yield self.store.get_rooms_for_user(sync_config.user.to_string())
-        room_ids = [room.room_id for room in rooms]
+            rooms = yield self.store.get_rooms_for_user(sync_config.user.to_string())
+            room_ids = [room.room_id for room in rooms]
 
-        typing_source = self.event_sources.sources["typing"]
-        typing, typing_key = yield typing_source.get_new_events(
-            user=sync_config.user,
-            from_key=typing_key,
-            limit=sync_config.filter_collection.ephemeral_limit(),
-            room_ids=room_ids,
-            is_guest=sync_config.is_guest,
-        )
-        now_token = now_token.copy_and_replace("typing_key", typing_key)
-
-        ephemeral_by_room = {}
-
-        for event in typing:
-            # we want to exclude the room_id from the event, but modifying the
-            # result returned by the event source is poor form (it might cache
-            # the object)
-            room_id = event["room_id"]
-            event_copy = {k: v for (k, v) in event.iteritems()
-                          if k != "room_id"}
-            ephemeral_by_room.setdefault(room_id, []).append(event_copy)
-
-        receipt_key = since_token.receipt_key if since_token else "0"
-
-        receipt_source = self.event_sources.sources["receipt"]
-        receipts, receipt_key = yield receipt_source.get_new_events(
-            user=sync_config.user,
-            from_key=receipt_key,
-            limit=sync_config.filter_collection.ephemeral_limit(),
-            room_ids=room_ids,
-            is_guest=sync_config.is_guest,
-        )
-        now_token = now_token.copy_and_replace("receipt_key", receipt_key)
+            typing_source = self.event_sources.sources["typing"]
+            typing, typing_key = yield typing_source.get_new_events(
+                user=sync_config.user,
+                from_key=typing_key,
+                limit=sync_config.filter_collection.ephemeral_limit(),
+                room_ids=room_ids,
+                is_guest=sync_config.is_guest,
+            )
+            now_token = now_token.copy_and_replace("typing_key", typing_key)
+
+            ephemeral_by_room = {}
+
+            for event in typing:
+                # we want to exclude the room_id from the event, but modifying the
+                # result returned by the event source is poor form (it might cache
+                # the object)
+                room_id = event["room_id"]
+                event_copy = {k: v for (k, v) in event.iteritems()
+                              if k != "room_id"}
+                ephemeral_by_room.setdefault(room_id, []).append(event_copy)
+
+            receipt_key = since_token.receipt_key if since_token else "0"
+
+            receipt_source = self.event_sources.sources["receipt"]
+            receipts, receipt_key = yield receipt_source.get_new_events(
+                user=sync_config.user,
+                from_key=receipt_key,
+                limit=sync_config.filter_collection.ephemeral_limit(),
+                room_ids=room_ids,
+                is_guest=sync_config.is_guest,
+            )
+            now_token = now_token.copy_and_replace("receipt_key", receipt_key)
 
-        for event in receipts:
-            room_id = event["room_id"]
-            # exclude room id, as above
-            event_copy = {k: v for (k, v) in event.iteritems()
-                          if k != "room_id"}
-            ephemeral_by_room.setdefault(room_id, []).append(event_copy)
+            for event in receipts:
+                room_id = event["room_id"]
+                # exclude room id, as above
+                event_copy = {k: v for (k, v) in event.iteritems()
+                              if k != "room_id"}
+                ephemeral_by_room.setdefault(room_id, []).append(event_copy)
 
         defer.returnValue((now_token, ephemeral_by_room))
 
@@ -451,13 +440,6 @@ class SyncHandler(BaseHandler):
         )
         now_token = now_token.copy_and_replace("presence_key", presence_key)
 
-        # We now fetch all ephemeral events for this room in order to get
-        # this users current read receipt. This could almost certainly be
-        # optimised.
-        _, all_ephemeral_by_room = yield self.ephemeral_by_room(
-            sync_config, now_token
-        )
-
         now_token, ephemeral_by_room = yield self.ephemeral_by_room(
             sync_config, now_token, since_token
         )
@@ -589,7 +571,6 @@ class SyncHandler(BaseHandler):
                 ephemeral_by_room=ephemeral_by_room,
                 tags_by_room=tags_by_room,
                 account_data_by_room=account_data_by_room,
-                all_ephemeral_by_room=all_ephemeral_by_room,
                 batch=batch,
                 full_state=full_state,
             )
@@ -619,58 +600,64 @@ class SyncHandler(BaseHandler):
         """
         :returns a Deferred TimelineBatch
         """
-        filtering_factor = 2
-        timeline_limit = sync_config.filter_collection.timeline_limit()
-        load_limit = max(timeline_limit * filtering_factor, 10)
-        max_repeat = 5  # Only try a few times per room, otherwise
-        room_key = now_token.room_key
-        end_key = room_key
-
-        limited = recents is None or newly_joined_room or timeline_limit < len(recents)
-
-        if recents is not None:
-            recents = sync_config.filter_collection.filter_room_timeline(recents)
-            recents = yield self._filter_events_for_client(
-                sync_config.user.to_string(),
-                recents,
-                is_peeking=sync_config.is_guest,
-            )
-        else:
-            recents = []
-
-        since_key = None
-        if since_token and not newly_joined_room:
-            since_key = since_token.room_key
-
-        while limited and len(recents) < timeline_limit and max_repeat:
-            events, end_key = yield self.store.get_room_events_stream_for_room(
-                room_id,
-                limit=load_limit + 1,
-                from_key=since_key,
-                to_key=end_key,
-            )
-            loaded_recents = sync_config.filter_collection.filter_room_timeline(events)
-            loaded_recents = yield self._filter_events_for_client(
-                sync_config.user.to_string(),
-                loaded_recents,
-                is_peeking=sync_config.is_guest,
-            )
-            loaded_recents.extend(recents)
-            recents = loaded_recents
-
-            if len(events) <= load_limit:
+        with Measure(self.clock, "load_filtered_recents"):
+            filtering_factor = 2
+            timeline_limit = sync_config.filter_collection.timeline_limit()
+            load_limit = max(timeline_limit * filtering_factor, 10)
+            max_repeat = 5  # Only try a few times per room, otherwise
+            room_key = now_token.room_key
+            end_key = room_key
+
+            if recents is None or newly_joined_room or timeline_limit < len(recents):
+                limited = True
+            else:
                 limited = False
-                break
-            max_repeat -= 1
 
-        if len(recents) > timeline_limit:
-            limited = True
-            recents = recents[-timeline_limit:]
-            room_key = recents[0].internal_metadata.before
+            if recents is not None:
+                recents = sync_config.filter_collection.filter_room_timeline(recents)
+                recents = yield self._filter_events_for_client(
+                    sync_config.user.to_string(),
+                    recents,
+                    is_peeking=sync_config.is_guest,
+                )
+            else:
+                recents = []
+
+            since_key = None
+            if since_token and not newly_joined_room:
+                since_key = since_token.room_key
+
+            while limited and len(recents) < timeline_limit and max_repeat:
+                events, end_key = yield self.store.get_room_events_stream_for_room(
+                    room_id,
+                    limit=load_limit + 1,
+                    from_key=since_key,
+                    to_key=end_key,
+                )
+                loaded_recents = sync_config.filter_collection.filter_room_timeline(
+                    events
+                )
+                loaded_recents = yield self._filter_events_for_client(
+                    sync_config.user.to_string(),
+                    loaded_recents,
+                    is_peeking=sync_config.is_guest,
+                )
+                loaded_recents.extend(recents)
+                recents = loaded_recents
 
-        prev_batch_token = now_token.copy_and_replace(
-            "room_key", room_key
-        )
+                if len(events) <= load_limit:
+                    limited = False
+                    break
+                max_repeat -= 1
+
+            if len(recents) > timeline_limit:
+                limited = True
+                recents = recents[-timeline_limit:]
+                room_key = recents[0].internal_metadata.before
+
+            prev_batch_token = now_token.copy_and_replace(
+                "room_key", room_key
+            )
 
         defer.returnValue(TimelineBatch(
             events=recents,
@@ -683,7 +670,6 @@ class SyncHandler(BaseHandler):
                                            since_token, now_token,
                                            ephemeral_by_room, tags_by_room,
                                            account_data_by_room,
-                                           all_ephemeral_by_room,
                                            batch, full_state=False):
         state = yield self.compute_state_delta(
             room_id, batch, sync_config, since_token, now_token,
@@ -714,7 +700,7 @@ class SyncHandler(BaseHandler):
 
         if room_sync:
             notifs = yield self.unread_notifs_for_room_id(
-                room_id, sync_config, all_ephemeral_by_room
+                room_id, sync_config
             )
 
             if notifs is not None:
@@ -831,50 +817,53 @@ class SyncHandler(BaseHandler):
         # updates even if they occured logically before the previous event.
         # TODO(mjark) Check for new redactions in the state events.
 
-        if full_state:
-            if batch:
-                state = yield self.store.get_state_for_event(batch.events[0].event_id)
-            else:
-                state = yield self.get_state_at(
-                    room_id, stream_position=now_token
-                )
+        with Measure(self.clock, "compute_state_delta"):
+            if full_state:
+                if batch:
+                    state = yield self.store.get_state_for_event(
+                        batch.events[0].event_id
+                    )
+                else:
+                    state = yield self.get_state_at(
+                        room_id, stream_position=now_token
+                    )
 
-            timeline_state = {
-                (event.type, event.state_key): event
-                for event in batch.events if event.is_state()
-            }
+                timeline_state = {
+                    (event.type, event.state_key): event
+                    for event in batch.events if event.is_state()
+                }
 
-            state = _calculate_state(
-                timeline_contains=timeline_state,
-                timeline_start=state,
-                previous={},
-            )
-        elif batch.limited:
-            state_at_previous_sync = yield self.get_state_at(
-                room_id, stream_position=since_token
-            )
+                state = _calculate_state(
+                    timeline_contains=timeline_state,
+                    timeline_start=state,
+                    previous={},
+                )
+            elif batch.limited:
+                state_at_previous_sync = yield self.get_state_at(
+                    room_id, stream_position=since_token
+                )
 
-            state_at_timeline_start = yield self.store.get_state_for_event(
-                batch.events[0].event_id
-            )
+                state_at_timeline_start = yield self.store.get_state_for_event(
+                    batch.events[0].event_id
+                )
 
-            timeline_state = {
-                (event.type, event.state_key): event
-                for event in batch.events if event.is_state()
-            }
+                timeline_state = {
+                    (event.type, event.state_key): event
+                    for event in batch.events if event.is_state()
+                }
 
-            state = _calculate_state(
-                timeline_contains=timeline_state,
-                timeline_start=state_at_timeline_start,
-                previous=state_at_previous_sync,
-            )
-        else:
-            state = {}
+                state = _calculate_state(
+                    timeline_contains=timeline_state,
+                    timeline_start=state_at_timeline_start,
+                    previous=state_at_previous_sync,
+                )
+            else:
+                state = {}
 
-        defer.returnValue({
-            (e.type, e.state_key): e
-            for e in sync_config.filter_collection.filter_room_state(state.values())
-        })
+            defer.returnValue({
+                (e.type, e.state_key): e
+                for e in sync_config.filter_collection.filter_room_state(state.values())
+            })
 
     def check_joined_room(self, sync_config, state_delta):
         """
@@ -895,21 +884,24 @@ class SyncHandler(BaseHandler):
         return False
 
     @defer.inlineCallbacks
-    def unread_notifs_for_room_id(self, room_id, sync_config, ephemeral_by_room):
-        last_unread_event_id = self.last_read_event_id_for_room_and_user(
-            room_id, sync_config.user.to_string(), ephemeral_by_room
-        )
-
-        notifs = []
-        if last_unread_event_id:
-            notifs = yield self.store.get_unread_event_push_actions_by_room_for_user(
-                room_id, sync_config.user.to_string(), last_unread_event_id
+    def unread_notifs_for_room_id(self, room_id, sync_config):
+        with Measure(self.clock, "unread_notifs_for_room_id"):
+            last_unread_event_id = yield self.store.get_last_receipt_event_id_for_user(
+                user_id=sync_config.user.to_string(),
+                room_id=room_id,
+                receipt_type="m.read"
             )
-            defer.returnValue(notifs)
 
-        # There is no new information in this period, so your notification
-        # count is whatever it was last time.
-        defer.returnValue(None)
+            notifs = []
+            if last_unread_event_id:
+                notifs = yield self.store.get_unread_event_push_actions_by_room_for_user(
+                    room_id, sync_config.user.to_string(), last_unread_event_id
+                )
+                defer.returnValue(notifs)
+
+            # There is no new information in this period, so your notification
+            # count is whatever it was last time.
+            defer.returnValue(None)
 
 
 def _action_has_highlight(actions):
diff --git a/synapse/handlers/typing.py b/synapse/handlers/typing.py
index 43bf600913..b16d0017df 100644
--- a/synapse/handlers/typing.py
+++ b/synapse/handlers/typing.py
@@ -19,6 +19,7 @@ from ._base import BaseHandler
 
 from synapse.api.errors import SynapseError, AuthError
 from synapse.util.logcontext import PreserveLoggingContext
+from synapse.util.metrics import Measure
 from synapse.types import UserID
 
 import logging
@@ -222,6 +223,7 @@ class TypingNotificationHandler(BaseHandler):
 class TypingNotificationEventSource(object):
     def __init__(self, hs):
         self.hs = hs
+        self.clock = hs.get_clock()
         self._handler = None
         self._room_member_handler = None
 
@@ -247,19 +249,20 @@ class TypingNotificationEventSource(object):
         }
 
     def get_new_events(self, from_key, room_ids, **kwargs):
-        from_key = int(from_key)
-        handler = self.handler()
+        with Measure(self.clock, "typing.get_new_events"):
+            from_key = int(from_key)
+            handler = self.handler()
 
-        events = []
-        for room_id in room_ids:
-            if room_id not in handler._room_serials:
-                continue
-            if handler._room_serials[room_id] <= from_key:
-                continue
+            events = []
+            for room_id in room_ids:
+                if room_id not in handler._room_serials:
+                    continue
+                if handler._room_serials[room_id] <= from_key:
+                    continue
 
-            events.append(self._make_event_for(room_id))
+                events.append(self._make_event_for(room_id))
 
-        return events, handler._latest_room_serial
+            return events, handler._latest_room_serial
 
     def get_current_key(self):
         return self.handler()._latest_room_serial
diff --git a/synapse/rest/client/v1/admin.py b/synapse/rest/client/v1/admin.py
index 5ec52707e7..e2f5eb7b29 100644
--- a/synapse/rest/client/v1/admin.py
+++ b/synapse/rest/client/v1/admin.py
@@ -26,7 +26,7 @@ logger = logging.getLogger(__name__)
 
 
 class WhoisRestServlet(ClientV1RestServlet):
-    PATTERNS = client_path_patterns("/admin/whois/(?P<user_id>[^/]*)$")
+    PATTERNS = client_path_patterns("/admin/whois/(?P<user_id>[^/]*)")
 
     @defer.inlineCallbacks
     def on_GET(self, request, user_id):
diff --git a/synapse/rest/client/v1/presence.py b/synapse/rest/client/v1/presence.py
index 9410ac527e..a6f8754e32 100644
--- a/synapse/rest/client/v1/presence.py
+++ b/synapse/rest/client/v1/presence.py
@@ -28,7 +28,7 @@ logger = logging.getLogger(__name__)
 
 
 class PresenceStatusRestServlet(ClientV1RestServlet):
-    PATTERNS = client_path_patterns("/presence/(?P<user_id>[^/]*)/status$")
+    PATTERNS = client_path_patterns("/presence/(?P<user_id>[^/]*)/status")
 
     @defer.inlineCallbacks
     def on_GET(self, request, user_id):
@@ -73,7 +73,7 @@ class PresenceStatusRestServlet(ClientV1RestServlet):
 
 
 class PresenceListRestServlet(ClientV1RestServlet):
-    PATTERNS = client_path_patterns("/presence/list/(?P<user_id>[^/]*)$")
+    PATTERNS = client_path_patterns("/presence/list/(?P<user_id>[^/]*)")
 
     @defer.inlineCallbacks
     def on_GET(self, request, user_id):
diff --git a/synapse/rest/client/v1/profile.py b/synapse/rest/client/v1/profile.py
index aeda7bfa39..3c5a212920 100644
--- a/synapse/rest/client/v1/profile.py
+++ b/synapse/rest/client/v1/profile.py
@@ -23,7 +23,7 @@ import simplejson as json
 
 
 class ProfileDisplaynameRestServlet(ClientV1RestServlet):
-    PATTERNS = client_path_patterns("/profile/(?P<user_id>[^/]*)/displayname$")
+    PATTERNS = client_path_patterns("/profile/(?P<user_id>[^/]*)/displayname")
 
     @defer.inlineCallbacks
     def on_GET(self, request, user_id):
@@ -60,7 +60,7 @@ class ProfileDisplaynameRestServlet(ClientV1RestServlet):
 
 
 class ProfileAvatarURLRestServlet(ClientV1RestServlet):
-    PATTERNS = client_path_patterns("/profile/(?P<user_id>[^/]*)/avatar_url$")
+    PATTERNS = client_path_patterns("/profile/(?P<user_id>[^/]*)/avatar_url")
 
     @defer.inlineCallbacks
     def on_GET(self, request, user_id):
@@ -97,7 +97,7 @@ class ProfileAvatarURLRestServlet(ClientV1RestServlet):
 
 
 class ProfileRestServlet(ClientV1RestServlet):
-    PATTERNS = client_path_patterns("/profile/(?P<user_id>[^/]*)$")
+    PATTERNS = client_path_patterns("/profile/(?P<user_id>[^/]*)")
 
     @defer.inlineCallbacks
     def on_GET(self, request, user_id):
diff --git a/synapse/storage/prepare_database.py b/synapse/storage/prepare_database.py
index d782b8e25b..850736c85e 100644
--- a/synapse/storage/prepare_database.py
+++ b/synapse/storage/prepare_database.py
@@ -211,7 +211,7 @@ def _upgrade_existing_database(cur, current_version, applied_delta_files,
     logger.debug("applied_delta_files: %s", applied_delta_files)
 
     for v in range(start_ver, SCHEMA_VERSION + 1):
-        logger.debug("Upgrading schema to v%d", v)
+        logger.info("Upgrading schema to v%d", v)
 
         delta_dir = os.path.join(dir_path, "schema", "delta", str(v))
 
diff --git a/synapse/storage/receipts.py b/synapse/storage/receipts.py
index 8068c73740..4202a6b3dc 100644
--- a/synapse/storage/receipts.py
+++ b/synapse/storage/receipts.py
@@ -46,6 +46,20 @@ class ReceiptsStore(SQLBaseStore):
             desc="get_receipts_for_room",
         )
 
+    @cached(num_args=3)
+    def get_last_receipt_event_id_for_user(self, user_id, room_id, receipt_type):
+        return self._simple_select_one_onecol(
+            table="receipts_linearized",
+            keyvalues={
+                "room_id": room_id,
+                "receipt_type": receipt_type,
+                "user_id": user_id
+            },
+            retcol="event_id",
+            desc="get_own_receipt_for_user",
+            allow_none=True,
+        )
+
     @cachedInlineCallbacks(num_args=2)
     def get_receipts_for_user(self, user_id, receipt_type):
         def f(txn):
@@ -226,6 +240,11 @@ class ReceiptsStore(SQLBaseStore):
             room_id, stream_id
         )
 
+        txn.call_after(
+            self.get_last_receipt_event_id_for_user.invalidate,
+            (user_id, room_id, receipt_type)
+        )
+
         # We don't want to clobber receipts for more recent events, so we
         # have to compare orderings of existing receipts
         sql = (
diff --git a/synapse/util/logcontext.py b/synapse/util/logcontext.py
index 9134e67908..b22a36336b 100644
--- a/synapse/util/logcontext.py
+++ b/synapse/util/logcontext.py
@@ -231,7 +231,7 @@ class PreserveLoggingContext(object):
         if self.current_context:
             self.has_parent = self.current_context.parent_context is not None
             if not self.current_context.alive:
-                logger.warn(
+                logger.debug(
                     "Entering dead context: %s",
                     self.current_context,
                 )
@@ -241,14 +241,14 @@ class PreserveLoggingContext(object):
         context = LoggingContext.set_current_context(self.current_context)
 
         if context != self.new_context:
-            logger.warn(
+            logger.debug(
                 "Unexpected logging context: %s is not %s",
                 context, self.new_context,
             )
 
         if self.current_context is not LoggingContext.sentinel:
             if not self.current_context.alive:
-                logger.warn(
+                logger.debug(
                     "Restoring dead context: %s",
                     self.current_context,
                 )
diff --git a/synapse/util/metrics.py b/synapse/util/metrics.py
index ca48007218..c51b641125 100644
--- a/synapse/util/metrics.py
+++ b/synapse/util/metrics.py
@@ -48,7 +48,10 @@ block_db_txn_duration = metrics.register_distribution(
 
 
 class Measure(object):
-    __slots__ = ["clock", "name", "start_context", "start"]
+    __slots__ = [
+        "clock", "name", "start_context", "start", "new_context", "ru_utime",
+        "ru_stime", "db_txn_count", "db_txn_duration"
+    ]
 
     def __init__(self, clock, name):
         self.clock = clock
@@ -59,9 +62,13 @@ class Measure(object):
     def __enter__(self):
         self.start = self.clock.time_msec()
         self.start_context = LoggingContext.current_context()
+        if self.start_context:
+            self.ru_utime, self.ru_stime = self.start_context.get_resource_usage()
+            self.db_txn_count = self.start_context.db_txn_count
+            self.db_txn_duration = self.start_context.db_txn_duration
 
     def __exit__(self, exc_type, exc_val, exc_tb):
-        if exc_type is not None:
+        if exc_type is not None or not self.start_context:
             return
 
         duration = self.clock.time_msec() - self.start
@@ -82,7 +89,9 @@ class Measure(object):
 
         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)
+        block_ru_utime.inc_by(ru_utime - self.ru_utime, self.name)
+        block_ru_stime.inc_by(ru_stime - self.ru_stime, self.name)
+        block_db_txn_count.inc_by(context.db_txn_count - self.db_txn_count, self.name)
+        block_db_txn_duration.inc_by(
+            context.db_txn_duration - self.db_txn_duration, self.name
+        )