spacewander commented on a change in pull request #5150:
URL: https://github.com/apache/apisix/pull/5150#discussion_r717377121
##########
File path: apisix/plugins/prometheus/exporter.lua
##########
@@ -153,6 +153,12 @@ function _M.log(conf, ctx)
metrics.latency:observe(upstream_latency,
gen_arr("upstream", route_id, service_id, consumer_name,
balancer_ip))
apisix_latency = apisix_latency - upstream_latency
+
+ -- TODO: bug founded, ref to
`https://github.com/apache/apisix/issues/5146`
Review comment:
```suggestion
-- The latency might be negative, as Nginx uses different time
measurements in
-- different metrics.
-- See
https://github.com/apache/apisix/issues/5146#issuecomment-928919399
```
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