From 36c426e294a53d2192cc9f29ec5c93e84e222228 Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Wed, 16 Jun 2021 13:29:54 +0100
Subject: Add debug logging when we enter/exit Measure block (#10183)

It can be helpful to know when trying to track down slow requests.
---
 synapse/util/metrics.py | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'synapse/util')

diff --git a/synapse/util/metrics.py b/synapse/util/metrics.py
index 6d14351bd2..45353d41c5 100644
--- a/synapse/util/metrics.py
+++ b/synapse/util/metrics.py
@@ -133,12 +133,17 @@ class Measure:
         self.start = self.clock.time()
         self._logging_context.__enter__()
         in_flight.register((self.name,), self._update_in_flight)
+
+        logger.debug("Entering block %s", self.name)
+
         return self
 
     def __exit__(self, exc_type, exc_val, exc_tb):
         if self.start is None:
             raise RuntimeError("Measure() block exited without being entered")
 
+        logger.debug("Exiting block %s", self.name)
+
         duration = self.clock.time() - self.start
         usage = self.get_resource_usage()
 
-- 
cgit 1.4.1