On Wednesday 20 May 2009 11:36:44 am Per Jessen wrote: ...
I missed to mention that prospect of having thousands of boxes that are asking for past DNS queries every 15 seconds in IPv6 and 4 adds load to my provider's DNS server.
No doubt, but that is what providers do.
That is how I can see slow resolution.
There must be the way to set longer interval and quit IPv6 that my DNS server have no clue about.
Find out what it is - AFAIK, nscd is only caching, it doesn't have a life of its own.
I guess it is checking validity of cached data.
Nope, I'm quite certain that is done by a TTL. nscd is a pretty simple daemon - if it doesn't have a fresh response to a query, it'll just say no and glibc will continue with the next option.
So, in other words something else was running DNS queries. Problem is that 'netstat -tupnc' can't catch anything.
Stopping it stops spurious queries.
Ah. I've just had a tcpdump running for 2 minutes and didn't see a single DNS query. Can't reproduce. If you run a tcpdump, it'll tell you what is being queried - maybe that'll give us a clue.
As mentioned past queries that I can recognize and some that were probably embedded in web pages, like google-analytics. So, without visit to few pages, ie. some activity there will be nothing. I guess it was Konqueror4 that opened pages. I checked with 'ps -elf' what is running and can have any need for those web pages, like kio_http, but there was none. Before I stopped nscd, I removed nepomuk and beagle, Konversation, KMail, online updater, that is all could recognize as possible online active, but DNS didn't stop. Finally when nscd was out of commission queries quited. -- Regards, Rajko http://news.opensuse.org/category/people-of-opensuse/ -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org