On Sep 27, 2011, at 11:29, John Hodrien wrote:
You probably want to do an strace -f host blah rather than a basic strace, or I think you'll lose what's going on.
Good point. Using -f doesn't show a 3+ second gap, but I still have no idea why it's slow (3-5 seconds) compared to CentOS5, or why using ltrace causes host or nslookup to crash. Can anybody else get ltrace to work with host?
Are you running either sssd or nscd on your box?
Yes, I am running nscd, but I didn't think it cached DNS queries.
I've done nothing special, and DNS seems fast enough.
And I have done nothing different than what I do in CentOS5, yet it is much slower (by at least an order of magnitude).
On Sep 27, 2011, at 13:05, Frank Cox wrote:
Have you considered installing dnsmasq on those machines?
No, this is in a corporate environment, and the queries that are slow are for names outside of our domain (i.e., the Internet), so I don't think it would help.
Any other ideas on how to diagnose the root cause?
Alfred