Hi, Do you have a load-balancer in front of Varnish? The decrease looks like the connections are being drained
Cheers, -- Guillaume Quintard On Mon, Oct 26, 2020 at 8:12 AM Sébastien EISSLER <[email protected]> wrote: > Hello, > > 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 > attachment) > - A restart of Varnish solved the problem, varnish accept all requests. > > Can you help us identify the problem? Do you need to adjust the > configuration? > 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, > -- > Sébastien > _______________________________________________ > varnish-misc mailing list > [email protected] > https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc >
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