How to know if my nginx is in good health?

[Edho Arief]

On Thu, Nov 22, 2012 at 12:51 PM, howard chen <howachen at gmail.com> wrote:
> Hi,
>
> I am running a nginx on EC2 (m1.small) for SSL termination.
>
> I am using 2 workers on Ubuntu, with latest nginx (stable), the network
> throughput is around 2Mbps and system load average is around 2 to 3.
>
> I am wondering if this system is in good health for now,
>
> e.g.
>
> what is the queue length (I know nginx can handle a lot of concurrent
> request, but I mean before the request is being served, how many of them
> need to wait before being served)
> what is the average queue time for a given request to be served.
>
> I want to know because if my nginx is cpu bounded (e.g. due to SSL), I will
> need to upgrade to a faster instance.
>
> My current nginx status
>
> Active connections: 4076
> server accepts handled requests
>  90664283 90664283 104117012
> Reading: 525 Writing: 81 Waiting: 3470
>
>
>
> Any idea?
>
>

why not just

vmstat 1

for few hours and see the cpu usage?