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-rw-r--r--synapse/util/caches/__init__.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/synapse/util/caches/__init__.py b/synapse/util/caches/__init__.py
index 35c0be08b0..f7c3a6794e 100644
--- a/synapse/util/caches/__init__.py
+++ b/synapse/util/caches/__init__.py
@@ -205,8 +205,9 @@ def register_cache(
         add_resizable_cache(cache_name, resize_callback)
 
     metric = CacheMetric(cache, cache_type, cache_name, collect_callback)
+    metric_name = "cache_%s_%s" % (cache_type, cache_name)
     caches_by_name[cache_name] = cache
-    CACHE_METRIC_REGISTRY.register_hook(metric.collect)
+    CACHE_METRIC_REGISTRY.register_hook(metric_name, metric.collect)
     return metric