Comment

1 files changed, 1 insertions, 0 deletions

diff --git a/synapse/python_dependencies.py b/synapse/python_dependencies.py

index d709033c27..6ad5cf582c 100644
--- a/synapse/python_dependencies.py
+++ b/synapse/python_dependencies.py
@@ -121,6 +121,7 @@ CONDITIONAL_REQUIREMENTS = {
     # hiredis is not a *strict* dependency, but it makes things much faster.
     # (if it is not installed, we fall back to slow code.)
     "redis": ["txredisapi>=1.4.7", "hiredis"],
+    # Required to use experimental `caches.track_memory_usage` config option.
     "cache_memory": ["pympler"],
 }