[Unbound-users] Unbound Slow to Prime

Mark Deneen mdeneen at gmail.com
Sun Aug 7 03:58:04 UTC 2011

On Sat, Aug 6, 2011 at 4:19 PM, Alan Gutierrez <alan at prettyrobots.com>wrote:

> It used to be the case that I could flush the unbound cache and then
> resolve a name immediately. Now there is a long delay before I start to get
> results. It is especially bad on Fedora 15 running in VirtualBox on OS X
> Lion, but I'm also seeing it slow down on Fedora 15 at EC2. I updated
> root.hints, but that didn't seem to help. I can't make much sense of the
> debugging logging output. A couple weeks ago, flushing cache or restarting,
> you might notice a light delay on the first lookup, but now it takes a few
> minutes to get results other than timeouts.
It doesn't look like you would experience this within VirtualBox or EC2, but
I had a very similar issue with Unbound behind a Cisco ASA.  The ASA would
reject responses > 512 bytes.  You may find a wireshark trace worth your


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