many workers threads failed with EAGAIN

[David Birdsong]

misses favor 1e-2[s]  with a few at 1e-1[s]


after retesting on a 16Gb machine, i'm getting much better results.
but still after varnish consumes all ram, iowait goes up, process load
skyrockets to like 2200 processes marked for run.  sometimes varnish
recovers in 5 minutes and others in about 1 minute.  this makes me
think that all the threads are piling up for something like access to
the lru list.

when i first starting testing tonight, the first pile-up was at 1 hour
which was what my lru_interval was set to.  i've since reduced via
varnishadm to 10 mins and it now hangs as soon as ram is
consumed(which takes a little over 10 mins).  i tried re-raising it to
3600 and even 4200, but it still seems to pile up sooner.

here's what a few graphs look like...
http://img162.imageshack.us/img162/9300/hourlyvarnishhang.png

aside from these pile-ups, i'm almost to a workable state.  though i'd
like to increase the backends to 5-6 if possible.

On Tue, Sep 1, 2009 at 1:59 AM, Poul-Henning Kamp<phk at phk.freebsd.dk> wrote:
> In message <dcccdf790908311636g39bbf036icdc66405e46aa919 at mail.gmail.com>, David
>  Birdsong writes:
>
> What does your responstimes look like in varnishhist ?
>
> --
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe
> Never attribute to malice what can adequately be explained by incompetence.
>