Traffic drop issue
guillaume at varnish-software.com
Tue Oct 27 16:21:55 UTC 2020
Do you have a load-balancer in front of Varnish? The decrease looks like
the connections are being drained
On Mon, Oct 26, 2020 at 8:12 AM Sébastien EISSLER <sebastien at sdv.fr> wrote:
> We encounter an issue on trafic increase event, here is the timeline:
> - We have normally ~1000 req/s, a event cause the traffic to increase to
> ~1400 req/s with spike at ~2300.
> - Varnish is creating new threads to the limit
> - threads_limited counter strongly increase
> - Varnish don't response to all requests, req/s decrease slowly to 0 (see
> - A restart of Varnish solved the problem, varnish accept all requests.
> Can you help us identify the problem? Do you need to adjust the
> You can find a param.show in attachement.
> # varnishd -V
> varnishd (varnish-6.4.0 revision 13f137934ec1cf14af66baf7896311115ee35598)
> Copyright (c) 2006 Verdens Gang AS
> Copyright (c) 2006-2020 Varnish Software AS
> We use hitch for TLS support:
> # hitch -V
> hitch 1.5.2
> Best Regards,
> varnish-misc mailing list
> varnish-misc at varnish-cache.org
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the varnish-misc