Question about http_stub_status
mdounin at mdounin.ru
Fri Aug 22 19:07:10 MSD 2008
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.
JFYI: you should rotate logfiles with SIGUSR1, not with SIGHUP. With
SIGHUP nginx re-configures itself, while with SIGUSR1 it does exactly one
thing needed to rotate logfiles: it reopens logs.
>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?
Sudden changes in stub_status numbers usually coresponds to died or
killed nginx worker. Take a look at logs.
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