From 891fcc696bcef5d5606dd4086d041eb55c3ccff0 Mon Sep 17 00:00:00 2001
From: Brian Gough <brian.gough@overleaf.com>
Date: Wed, 25 Mar 2020 12:15:35 +0000
Subject: [PATCH] add metric for pending updates queue

---
 .../document-updater/app/coffee/RealTimeRedisManager.coffee    | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/services/document-updater/app/coffee/RealTimeRedisManager.coffee b/services/document-updater/app/coffee/RealTimeRedisManager.coffee
index d04f2304d3..6fd48033da 100644
--- a/services/document-updater/app/coffee/RealTimeRedisManager.coffee
+++ b/services/document-updater/app/coffee/RealTimeRedisManager.coffee
@@ -5,6 +5,7 @@ Keys = Settings.redis.documentupdater.key_schema
 logger = require('logger-sharelatex')
 os = require "os"
 crypto = require "crypto"
+metrics = require('./Metrics')
 
 HOST = os.hostname()
 RND = crypto.randomBytes(4).toString('hex') # generate a random key for this process
@@ -27,6 +28,8 @@ module.exports = RealTimeRedisManager =
 				catch e
 					return callback e
 				updates.push update
+				# record metric for updates removed from queue
+				metrics.summary "redis.pendingUpdates", jsonUpdate.length, {status: "pop"}
 			callback error, updates
 
 	getUpdatesLength: (doc_id, callback)->