Hi Uday, pz_list and recv_queue are not (to my knowledge) Varnish counters, where are you seeing them?
I doubt Varnish is actually replying with 0, so that probably is your client faking a response code to have something to show. But that's a detail, as the unresponsiveness is real. Could you share a "varnishstat -1" of the impacted machine? -- Guillaume Quintard On Thu, Jun 20, 2024 at 9:30 AM Uday Kumar <[email protected]> wrote: > Hello all, > > We are facing frequent issues of varnish unresponsiveness for sometime on > our production server. > > During this time we have seen that pz_list is being increased to ~3000 and > recv_queue is increased to ~130 > Also, varnish is responding with response code '0' for sometime, which > meant unresponsive. > > This is causing multiple 5xx on front ends. > > FYR: > User request count during this time is normal. > > Note: > During this time, we have confirmed that our backend servers are healthy > without any issues. > > > May I know what could be the reason for this behaviour at varnish? > > Please give me the direction on how to debug this issue. > _______________________________________________ > varnish-misc mailing list > [email protected] > https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc >
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