From 6a78ede56932b486c0ca3cc7c6edd84a2f373366 Mon Sep 17 00:00:00 2001
From: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
Date: Mon, 17 Jan 2022 12:14:40 +0000
Subject: Improve `reactor_tick_time` metric (#11724)

The existing implementation of the `python_twisted_reactor_tick_time` metric is pretty useless, because it *only*
measures the time taken to execute timed calls and callbacks from threads. That neglects everything that
happens off the back of I/O, which is obviously quite a lot for us.

To improve this, I've hooked into a different place in the reactor - in particular, where it calls `epoll`. That call is
the only place it should wait for something to happen - the rest of the loop *should* be quick.

I've also removed `python_twisted_reactor_pending_calls`, because I don't believe anyone ever looks at it, and
it's a nuisance to populate.
---
 changelog.d/11724.removal | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 changelog.d/11724.removal

(limited to 'changelog.d/11724.removal')

diff --git a/changelog.d/11724.removal b/changelog.d/11724.removal
new file mode 100644
index 0000000000..088c3ff31f
--- /dev/null
+++ b/changelog.d/11724.removal
@@ -0,0 +1 @@
+Remove `python_twisted_reactor_pending_calls` prometheus metric.
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