What is the value your max-cache-entries set to, Brendan? I set it to 40000 looking at the graph "Cache sizes". The curve for cache sizes is slowly rising above 40k. But I would be worried because there are about 400 MB free of RAM Playing with recursive-cache-ttl seems to me more worthwhile too. I set it to 600 for now to see it improves anything. And finally thanks for a hint about allow-recursion-override, I didn't know that. I'll try that too.
Apart from this I'll try to experiment with key_buffer as it was proposed by Brad Dameron earlier today. Thanks to Brad as well Eugene -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brendan Oakley Sent: Wednesday, April 30, 2008 12:32 PM To: [email protected] Subject: Re: [Pdns-users] powerdns auth and recursor hardware specs Hi, I can't really speak to the specifics of your setup, but some generalities based on ours. On Tue, Apr 29, 2008 at 10:39 PM, Eugene Pefti <[EMAIL PROTECTED]> wrote: > I think I miss something here. Can somebody give an example of hardware > specs for the authoritative server with recursor running? I run it on CentOS > 5 with 2.6 GHz P4 and 1 GB of RAM. There's MySQL backend and about 700 > domains hosted. Still the server experiences periods of slowness. I have > already presented a link to rrd graphs for the server. Do I have to run a > separate box with the recursor? I have found that when running the authoritative server with the recursor, it is necessary to set a limit on max-cache-entries. By default, it has no limit, and that can potentially cause too much memory usage depending on load. Also, increasing the recursive-cache-ttl in pdns.conf helped a lot to reduce the load on the recursor. It took some experimenting with these and other settings to get it all fully optimized for our network. I was surprised that allow-recursion-override=yes needed to be set, it's no by default, so that some authoritative queries go to the recursor. I don't get that. I hope that's helpful. Brendan _______________________________________________ Pdns-users mailing list [email protected] http://mailman.powerdns.com/mailman/listinfo/pdns-users _______________________________________________ Pdns-users mailing list [email protected] http://mailman.powerdns.com/mailman/listinfo/pdns-users
