From 6cf21d3c2f0030ef7517c8a18367cfa49c8d130f Mon Sep 17 00:00:00 2001
From: dabue <53054094+dabue@users.noreply.github.com>
Date: Thu, 28 May 2020 23:41:59 +0800
Subject: [PATCH] bugfix(prometheus): the `overhead` should use milliseconds.
 #1615 (#1616)

Fix #1615
---
 apisix/plugins/prometheus/exporter.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apisix/plugins/prometheus/exporter.lua b/apisix/plugins/prometheus/exporter.lua
index de72910c2a07..2c0b6fc618ab 100644
--- a/apisix/plugins/prometheus/exporter.lua
+++ b/apisix/plugins/prometheus/exporter.lua
@@ -110,7 +110,7 @@ function _M.log(conf, ctx)
 
     local overhead = latency
     if ctx.var.upstream_response_time then
-        overhead = overhead - tonumber(ctx.var.upstream_response_time)
+        overhead =  overhead - tonumber(ctx.var.upstream_response_time) * 1000
     end
     metrics.overhead:observe(overhead,
         gen_arr("request", service_id, balancer_ip))