I've never seen it do worker threads not created.

Are there any limits on number of threads? Can you get rid of - w1440,3000,60 and rely on the -p settings instead?

Artur

On Apr 11, 2009, at 12:46 PM, Ray Barnes wrote:

Thanks for the reply, answers inline:

On Fri, Apr 10, 2009 at 7:30 PM, John Adams <j...@twitter.com> wrote:
Something's very wrong here - we've never experienced this before.

Are you stating the server as root or as another user?

As root.

Any ulimit or restrictions on # of file descriptors?

I'm manually setting ulimit in the script that starts varnishd, like so:

ulimit -n 131072
ulimit -l 82000
Other than that, and having manually set /proc/sys/fs/file-max to 65535, all other settings are default according to RHEL 5 and Linux 2.6.18 with Xen patches and backports maintained by xen.org (the aforementioned results were all obtained by running varnish under domain 0). I tried this on another box which is RHEL 4.6 with 2.6.9-55.0.2.ELsmp (so no Xen in this case), and /proc/sys/fs/file- max set to 49984 (using the same script to launch varnish as aforementioned), the result was relatively the same:

         290  N worker threads
         290  N worker threads created
        8705  N worker threads not created
      409188  N worker threads limited
HTH.

-Ray

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