Apply suggestions from code review

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/metrics/__init__.py b/synapse/metrics/__init__.py

index 6de91d826c..93662fa134 100644
--- a/synapse/metrics/__init__.py
+++ b/synapse/metrics/__init__.py
@@ -539,7 +539,7 @@ REGISTRY.register(ReactorLastSeenMetric())
 # thresholds and counts.
 MIN_TIME_BETWEEN_GCS = [1, 10, 30]
 
-# The time in seconds of the last time we did a GC for each generation.
+# The time (in seconds since the epoch) of the last time we did a GC for each generation.
 _last_gc = [0, 0, 0]