AW: AW: Aw: [squid-users] Running two squid3 process, Why?

> Why signal 6?

signal 6 like mentioned in

Aug 4 10:27:27 mybox squid[11814]: Squid Parent: child process 13220 exited due to signal 6 with status 0
Aug 4 10:27:30 mybox squid[11814]: Squid Parent: child process 14441 started
Aug 4 10:27:30 mybox squid[14441]: Starting Squid Cache version 3.1.0.12-20090

kills the whole http service ?
Oh really ? I thought it was a kind of graceful restart described on http://httpd.apache.org/docs/2.2/stopping.html

> I don't see how wget would have surived that if it was using the
> proxy..
So I probably send an SIGUSR1 during my tests...

Anyway the service interruption should be very short while sending signal 6 ...? according to the log snippet approximately 3 seconds...

What's about the keep-alive thing in http ? http://en.wikipedia.org/wiki/HTTP_persistent_connection
Sorry I am really confused about how loadbalancers e.g. linuxvirtualserver.org are dealing with such a short service interruption.

I used linuxvirtualserver.org with a connect_timeout of 5 secs. So the clients should stay connected to the same squidbox if service interruption < 5secs ?
Sorry it's all a bit confusing.

thanks for your advise

Jan
>
>
> > How would loadbalancers handle this behaviour ? Do they notice this
> signal 6 ?
>
> Signal 6 forces an unexpected restart, temporarily stopping the whole
> service.. very intrusive.
>
> > By the way is signal 6 really
> >
> > $ kill -l
> > 6) SIGABRT ?
>
> Yes.
>
> It's much better if you use the "squid -k ..." functions to communicate
> with Squid than using kill manually..
>
> Regards
> Henrik
Received on Tue Aug 04 2009 - 12:57:16 MDT