diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py
index 67b8ca28c7..58edf21472 100644
--- a/synapse/handlers/sync.py
+++ b/synapse/handlers/sync.py
@@ -20,6 +20,8 @@ import logging
from six import iteritems, itervalues
+from prometheus_client import Counter
+
from twisted.internet import defer
from synapse.api.constants import EventTypes, Membership
@@ -36,6 +38,13 @@ from synapse.visibility import filter_events_for_client
logger = logging.getLogger(__name__)
+
+# Counts the number of times we got asked for a lazy loaded sync. Type is one of
+# initial_sync, full_sate_sync or incremental_sync
+lazy_member_sync_counter = Counter(
+ "synapse_handlers_sync_lazy_member_sync", "", ["type"],
+)
+
# Store the cache that tracks which lazy-loaded members have been sent to a given
# client for no more than 30 minutes.
LAZY_LOADED_MEMBERS_CACHE_MAX_AGE = 30 * 60 * 1000
@@ -227,14 +236,19 @@ class SyncHandler(object):
@defer.inlineCallbacks
def _wait_for_sync_for_user(self, sync_config, since_token, timeout,
full_state):
+ if since_token is None:
+ sync_type = "initial_sync"
+ elif full_state:
+ sync_type = "full_state_sync"
+ else:
+ sync_type = "incremental_sync"
+
context = LoggingContext.current_context()
if context:
- if since_token is None:
- context.tag = "initial_sync"
- elif full_state:
- context.tag = "full_state_sync"
- else:
- context.tag = "incremental_sync"
+ context.tag = sync_type
+
+ if sync_config.filter_collection.lazy_load_members():
+ lazy_member_sync_counter.labels(sync_type).inc()
if timeout == 0 or since_token is None or full_state:
# we are going to return immediately, so don't bother calling
|