monitor nginx request with nginx status amplify datadog new relic

nginx status Module

Deprecated due to exploit

install just

nginx -V 2>&1 | grep -o with-http_stub_status_module

by default it displays

with-http_stub_status_module

configure

location /nginx_status {
          stub_status on;
          access_log   off;
          allow 1.1.1.1;
allow 1.1.1.1;
          deny all;
        }

your app address

ip.com/nginx_status

nginx status page explained

Active connections: 46

server connections till now rom start 54373
accepts 54373
handled requests 57342
Rejected
timedout:
request/s=
handled/accepted

57342/54373=1.054

1 request/s

nginx able to handle 1024 connections per second with single core,

2048 connections with dual core.

2 cpu cores given  54,368 connection per second in a test.

Average requests per server connection in nginx wordpress

Reading: 0 Writing: 1 Waiting: 45

Reading – nginx reads request header

Writing – nginx reads request body, processes request, or writes response to a client

keepalive/waiting  =active – (reading + writing)

Disable keepalive  to see it as zero.

connections Accepted Per Second
connections Active: Active connections
connections Dropped Per Second
connections Reading and net.connections Writing
connections Waiting
requests Per Second

Note: every connection may have 30+ requests  you may see in chrome dev tools.

error log rate /var/log/nginx/error.log

server http connection vs requests

HTTP connections – client and server introduce themselves. tcp handshake

HTTP requests – client ask something from server

1 connection with 5js , 2 css, 10 images browser requests/resources

NGINX Amplify

NGINX Amplify is a free, SaaS based monitoring tool for NGINX Open Source and NGINX Plus.

also able to view mysql, linux, php metrics

https://www.nginx.com/products/nginx-amplify/

monitoring with nginx variables

$request_time and $upstream_response_time (total time taken by nginx and any upstream servers to process a request and send a response)

$upstream_response_time / php fpm or apache with mysql.

new relic & data dogs are freemium monitoring services for your server or application

Reference:

https://www.datadoghq.com/blog/how-to-monitor-nginx/

https://blog.newrelic.com/product-news/how-to-monitor-nginx-performance/