le server-status de nginx : comment interpréter l'output

Interpretation

Active connections – Number of all open connections. This doesn’t mean number of users. A single user, for a single pageview can open many concurrent connections to your server.
Server accepts handled requests – This shows three values.
    First is total accepted connections.
    Second is total handled connections. Usually first 2 values are same.
    Third value is number of and handles requests. This is usually greater than second value.
    Dividing third-value by second-one will give you number of requests per connection handled by Nginx. In above example, 10993/7368, 1.49 requests per connections.
Reading – nginx reads request header
Writing – nginx reads request body, processes request, or writes response to a client
Waiting – keep-alive connections, actually it is active – (reading + writing).This value depends on keepalive-timeout. Do not confuse non-zero waiting value for poor performance. It can be ignored. Although, you can force zero waiting by setting keepalive_timeout 0;