1 files changed, 6 insertions, 0 deletions
diff --git a/synapse/metrics/__init__.py b/synapse/metrics/__init__.py
index 087a49d65d..6035672698 100644
--- a/synapse/metrics/__init__.py
+++ b/synapse/metrics/__init__.py
@@ -463,6 +463,12 @@ event_processing_last_ts = Gauge("synapse_event_processing_last_ts", "", ["name"
 # finished being processed.
 event_processing_lag = Gauge("synapse_event_processing_lag", "", ["name"])
 
+event_processing_lag_by_event = Histogram(
+    "synapse_event_processing_lag_by_event",
+    "Time between an event being persisted and it being queued up to be sent to the relevant remote servers",
+    ["name"],
+)
+
 # Build info of the running server.
 build_info = Gauge(
     "synapse_build_info", "Build information", ["pythonversion", "version", "osversion"]