4 Sep
2013
4 Sep
'13
11:07 a.m.
Hello!
I was running Perdition on my server, but we often see connections
ending in CLOSE-WAIT state, needing to kill the involved processes to
clear.
Is there a timeout somewhere that I forgot to set, resulting in this
behavior? Or, what could be the cause of these whole bunch of
CLOSE-WAITs?
Here's some info on my system:
uname -a
Linux mail-3 3.2.0-52-virtual #78-Ubuntu SMP Fri Jul 26 16:45:00 UTC
2013 x86_64 x86_64 x86_64 GNU/Linux
dpkg-query --list perdition
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version
Description
+++-=================================-=================================-==================================================================================
ii perdition 1.19~rc4-4build1
POP3 and IMAP4 Proxy server
Thank you for your assistance.
Rgds,
--
FdS Pandu E Poluan
~ IT Optimizer ~
• LOPSA Member #15248
• Blog : http://pepoluan.tumblr.com
• Linked-In : http://id.linkedin.com/in/pepoluan
9 Sep
9 Sep
5:14 a.m.
On Wed, Sep 4, 2013 at 6:07 PM, Pandu Poluan <pandu(a)poluan.info> wrote:
Hello!
I was running Perdition on my server, but we often see connections
ending in CLOSE-WAIT state, needing to kill the involved processes to
clear.
Is there a timeout somewhere that I forgot to set, resulting in this
behavior? Or, what could be the cause of these whole bunch of
CLOSE-WAITs?
--snip--
Did my previous email make it into the mailing list?
Rgds,
--
FdS Pandu E Poluan
~ IT Optimizer ~
• LOPSA Member #15248
• Blog : http://pepoluan.tumblr.com
• Linked-In : http://id.linkedin.com/in/pepoluan
7:59 a.m.
Am 09.09.2013 07:14, schrieb Pandu Poluan:
Did my previous email make it into the mailing list?
Yes it did :)
There is a setting with "reuse" in its name, somewhere in /proc. It is
actually only for tuning but we use it, too. It reduces the timeout of
the waiting connections, which are closed already. The default timeout
is 2 minutes, I think.
Does netstat -ntp print out the PID of a perdition process or a "-" ?
Regards
M.Hunstock
--
Dipl.-Inf. Matthias Hunstock
UniRZ der TU Ilmenau, Raum 07
Tel.: +49 3677 69-1289
9:20 a.m.
On Mon, Sep 9, 2013 at 2:59 PM, Matthias Hunstock
<matthias.hunstock(a)tu-ilmenau.de> wrote:
Am 09.09.2013 07:14, schrieb Pandu Poluan:
Using 'ss -o state close-wait' indeed returns PIDs of perdition processes.
Currently I did it the brute way: A cronscript running every 30
minutes finds all the PIDs involved and pkill them in one fell swoop.
It's not elegant, but it works...
The sheer number of close-wait connections is a cause of concern for
me, though... in that 30 minute period before the script gets
triggered, the number of close-wait connections reaches a high of
200-something.
Rgds,
--
FdS Pandu E Poluan
~ IT Optimizer ~
• LOPSA Member #15248
• Blog : http://pepoluan.tumblr.com
• Linked-In : http://id.linkedin.com/in/pepoluan
Did my previous email make it into the mailing
list?
Yes it did :)
There is a setting with "reuse" in its name, somewhere in /proc. It is
actually only for tuning but we use it, too. It reduces the timeout of
the waiting connections, which are closed already. The default timeout
is 2 minutes, I think.
Does netstat -ntp print out the PID of a perdition process or a "-" ?
Regards
M.Hunstock
9:24 a.m.
Am 09.09.2013 11:20, schrieb Pandu Poluan:
The sheer number of close-wait connections is a cause
of concern for
me, though... in that 30 minute period before the script gets
triggered, the number of close-wait connections reaches a high of
200-something.
I just looked for the numbers in our perdition system.
Average over the last hour:
established: 5730
close-wait: 408
time-wait: 105
fin-wait1: 27
fin-wait2: 7
I don't see any trouble, this particular system is running for ~ 3 years
now.
Regards
M.Hunstock
--
Dipl.-Inf. Matthias Hunstock
UniRZ der TU Ilmenau, Raum 07
Tel.: +49 3677 69-1289
3894
days inactive
3899
days old
4 comments
2 participants
participants (2)
-
Matthias Hunstock -
Pandu Poluan