diff --git a/changelog.d/13036.feature b/changelog.d/13036.feature
new file mode 100644
index 000000000..71e5a29fe
--- /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 da25f20ae..9d3fe6610 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.