look at the stub status module: http://wiki.nginx.org/NginxHttpStubStatusModule

2009/7/17 vburshteyn <nginx-forum@nginx.us>:
> Hi,
>
> I am just curious to find out what do you folks use to measure nginx performance, aka how many requests it is handling at any given time and such....
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>
> Thanks,
>
> Posted at Nginx Forum: http://forum.nginx.org/read.php?2,4146,4146#msg-4146
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>