[GitHub] [apisix] zhendongcmss edited a comment on issue #5146: bug: Prometheus plugin metrics http latency sum is negative

[GitBox <gi...@apache.org>]

zhendongcmss edited a comment on issue #5146:
URL: https://github.com/apache/apisix/issues/5146#issuecomment-928933666


   Facts proved `ngx.update_time()` doesn't work.
   ```
   @@ -150,12 +150,17 @@ function _M.log(conf, ctx)
        metrics.latency:observe(latency,
            gen_arr("request", vars.status, method_id, route_id, service_id, consumer_name, balancer_ip))
    
   +    ngx.update_time()
        local apisix_latency = latency
        if ctx.var.upstream_response_time then
            local upstream_latency = ctx.var.upstream_response_time * 1000
            metrics.latency:observe(upstream_latency,
                gen_arr("upstream", vars.status, method_id, route_id, service_id, consumer_name, balancer_ip))
            apisix_latency =  apisix_latency - upstream_latency
   +        if apisix_latency < 0 then
   +            ngx.log(ngx.EMERG, "123456789","latency now ", ngx.now(), ", start_time: ", ngx.req.start_time(), ", upstream: ",
   +            ctx.var.upstream_response_time)
   +        end
   ```
   
   
   
   
   
   
   


-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: notifications-unsubscribe@apisix.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org