[Pdns-users] stuck tcp sessions on recursor
spork at bway.net
Mon Feb 28 08:59:10 UTC 2011
On Thu, 24 Feb 2011, bert hubert wrote:
> On Thu, Feb 24, 2011 at 03:06:12PM -0500, Charles Sprickman wrote:
>>> this definitely sounds like 3.3 material!
>> So far so good, nearly 500,000 tcp queries without any lingering sockets.
>> Totally unrelated, but I see a stat that's not mentioned in the
>> docs: "no-packet-error 492682". What is that, and is it any cause
>> for concern?
> It is a debugging metric we added to see if our event multiplexing
> infrastructure is operating as well as it could. Can you give me the output
> of 'rec_control get-all' after some time of operation?
OK, so this has been running since thursday afternoon, so there should be
a good amount of data:
> It is probably of no concern, but it might waste some CPU cycles. Probably
> no-packet-error is a lot smaller than your number of questions and
Yep, total questions is 567237874, no-packet-error is 73902632, so roughly
maybe 1/6 of all questions.
Let me know if you want to see any other data...
>> I'm really happy with the recursor so far, we previously used
>> dnscache and we're seeing about 1/5 the cpu usage and I believe
>> we're also answering queries that we weren't before - our overall
>> qps went up quite a bit after the switch.
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