On 9/3/12, Peter van Dijk <[email protected]> wrote: > Hello John, > > On Sep 1, 2012, at 0:00 , John Miller wrote: > >> I've attached statistics logs from the day of the crash; we're seeing >> somewhere between 100 and 300 qps on ns1 and 25 to 100 qps on ns2. Any >> thoughts on what would cause two nameservers to lock up simultaneously? >> Anyone experienced anything similar? > > > This does not sound familiar to us. Usually, unexplained crashes are related > to out of memory situations, but your caches did not seem to be the same > size at the point of crash. However, if you can keep an eye on memory use > (perhaps with some graphs), that might provide some clues for the future. >
Thanks for the reply, Peter. I have sar stats for the times right around the crash, but it didn't look like memory was the issue here--the machines themselves didn't lock up, only the pdns-recursor daemons. Today's a holiday here in the US, so I'll post them when I'm back at work tomorrow. I'll also set up some identical servers in a sandbox environment, then see if I can replay our traffic to them (or some other networking voodoo) to see if I can repeat this. To everyone on the list--I'm still a relative newbie to PowerDNS Recursor; what parameters are you using in terms of max-cache-size, max-packetcache-size, max-packetcache-ttl, ringbuffer-size etc.? What are you seeing in terms of queries/second? John _______________________________________________ Pdns-users mailing list [email protected] http://mailman.powerdns.com/mailman/listinfo/pdns-users
