Question about http_stub_status

[Igor Sysoev]

On Fri, Aug 22, 2008 at 01:51:12PM +0200, Marcus Bianchy wrote:

> we are using the "Stub Status Module" now for a couple of days, and
> there is a something strange effect with the values from this module:
> 
> The first few hours the values for  "Active connections" and "Waiting"
> were reasonable and low (some few hundred).
> After a while, both of these values suddenly increased to ~5000, then
> few hours later to ~20000, then to ~30000.
> It doesn't matter if we are rotating our logfiles (with SIGHUP): These
> values are still high around ~30000.

nginx has special rotation signal: SIGUSR1.

> For what are these values standing for? What is happening there? BTW:
> netstat et al. says some hundred or few thousand concurrent (i.e.
> ESTABLISHED) connections (and some FIN_WAIT etc. too)
> 
> Maybe there is one who can explain this behavior?

This means that either someone killed nginx workers using SIGTERM/INT/KILL
or workers exited abnornamally. Could you run

grep alert error_log 

?


-- 
Igor Sysoev
http://sysoev.ru/en/