[Samba] Thousands of TIME_WAIT connections with CUPS?

[Michael Wood]

2009/11/5 Adam Nielsen <adam.nielsen at uq.edu.au>:
>> I don't have an answer for your actual question, but if it takes
>> several seconds to get this list, it's probably because of DNS
>> queries, and using "-n" will speed it up dramatically.
>
> Thanks for the suggestion.  I was actually using "cat /proc/net/tcp" as
> this is what the monitoring software uses, so there's no DNS lookups
> there.  Just the sheer number of them (and any processing done by the
> monitoring software) is the cause of the delay.

Ah, OK.  Then is it possible to get your monitoring software to ignore
the 127.0.0.1:631 connections?

> Adding -n when using 'netstat' only shaves off 0.3 seconds, I guess
> because 99% of them are all "localhost"!
>
> But of course the connections shouldn't be there in the first place, so
> any ideas how to get rid of them would be much appreciated!  I am only
> running Samba 3.2 though, so perhaps the problem will go away when I get
> a chance to upgrade to 3.4...

I don't think that will help.

See the following:
http://www.developerweb.net/forum/showthread.php?t=2941
The diagram there is a bit corrupted from the original ASCII art
version (missing sequence numbers etc.), so see figure 13 from here:
http://tools.ietf.org/html/rfc793

See also:
http://www.developerweb.net/forum/showthread.php?t=5995
http://www.developerweb.net/forum/showthread.php?t=3752
http://blog.port80software.com/2004/12/07/hurry-up-and-time_wait/

-- 
Michael Wood <esiotrot at gmail.com>