From 36c426e294a53d2192cc9f29ec5c93e84e222228 Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Wed, 16 Jun 2021 13:29:54 +0100 Subject: [PATCH] Add debug logging when we enter/exit Measure block (#10183) It can be helpful to know when trying to track down slow requests. --- changelog.d/10183.misc | 1 + synapse/util/metrics.py | 5 +++++ 2 files changed, 6 insertions(+) create mode 100644 changelog.d/10183.misc diff --git a/changelog.d/10183.misc b/changelog.d/10183.misc new file mode 100644 index 0000000000..c0e01ad3db --- /dev/null +++ b/changelog.d/10183.misc @@ -0,0 +1 @@ +Add debug logging for when we enter and exit `Measure` blocks. 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()