spacewander commented on issue #5146:
URL: https://github.com/apache/apisix/issues/5146#issuecomment-927627423
Maybe we can add:
```
diff --git apisix/plugins/prometheus/exporter.lua
apisix/plugins/prometheus/exporter.lua
index ea1c4843..4a8ec64e 100644
--- apisix/plugins/prometheus/exporter.lua
+++ apisix/plugins/prometheus/exporter.lua
@@ -153,6 +153,10 @@ 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
+ if apisix_latency < 0 then
+ ngx.log(ngx.EMERG, "latency now ", ngx.now(), ", start_time: ",
ngx.req.start_time(), ", upstream: ",
+ ctx.var.upstream_response_time)
+ end
end
metrics.latency:observe(apisix_latency,
gen_arr("apisix", route_id, service_id, consumer_name, balancer_ip))
```
to see each value of the items.
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