diff options
| -rw-r--r-- | changelog.d/13036.feature | 1 | ||||
| -rw-r--r-- | synapse/state/__init__.py | 12 |
2 files changed, 13 insertions, 0 deletions
diff --git a/changelog.d/13036.feature b/changelog.d/13036.feature new file mode 100644 index 0000000000..71e5a29fe9 --- /dev/null +++ b/changelog.d/13036.feature @@ -0,0 +1 @@ +Add metrics measuring the CPU and DB time spent in state resolution. diff --git a/synapse/state/__init__.py b/synapse/state/__init__.py index da25f20ae5..9d3fe66100 100644 --- a/synapse/state/__init__.py +++ b/synapse/state/__init__.py @@ -444,6 +444,15 @@ _biggest_room_by_db_counter = Counter( "expensive room for state resolution", ) +_cpu_times = Histogram( + "synapse_state_res_cpu_for_all_rooms_seconds", + "CPU time (utime+stime) spent computing a single state resolution", +) +_db_times = Histogram( + "synapse_state_res_db_for_all_rooms_seconds", + "Database time spent computing a single state resolution", +) + class StateResolutionHandler: """Responsible for doing state conflict resolution. @@ -609,6 +618,9 @@ class StateResolutionHandler: room_metrics.db_time += rusage.db_txn_duration_sec room_metrics.db_events += rusage.evt_db_fetch_count + _cpu_times.observe(rusage.ru_utime + rusage.ru_stime) + _db_times.observe(rusage.db_txn_duration_sec) + def _report_metrics(self) -> None: if not self._state_res_metrics: # no state res has happened since the last iteration: don't bother logging. |