WOW!
Bryan,
Don't know why, yet, but the answer is yes, it means 1140 open
connections.
Now we have to figure out what is happening. If you stop the POP3
service, it will clear the numbers and you can observe this using
the Telnet, for a while, opening and closing it and watching that
last number. Good time to turn on logging for POP3 service, too
(before the stop/start). That may give us some clues as to what/who
is doing this. Could even be some form of Dos attack.
The next possibility is that something is keeping data from being
written by the service, but this might have affects on other
services, like Web MSG (it read/writes mailbox data). Keep an eye on
all the running services, to see if anything else is showing effects
(outside of a general slowdown, but even that might be a clue!).
Good idea to make sure HD is in good condition by running chkdsk or
scandisk.
Did the PerfMon graph show anything during this time?
Judging from the first number, the POP3 service had been restarted
recently. How long was the time from reset to you finding the
problem? Does this problem seem to happening on any daily or other
repeatable pattern? Are you reseting the service on some regular
basis? If not, it might help keep things going while investigating
things. An AT command with 'net stop pop3d32','net start pop3d32'
lines, will do the trick.
Daniel Donnelly
__________________________________________________________
In reply to 17 Dec message from [EMAIL PROTECTED]:
>My POP server stopped responding and the last two numbers were
>1280-1140.
>Does that mean there were 1140 open (locked/inuse/dead/) pop
>connections?
>Any idea why this might be happening.
>Bryan
>----- Original Message -----
>From: "Daniel Donnelly" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Sent: Friday, December 15, 2000 12:03 PM
>Subject: Re: [IMail Forum] Services stalling out
>> Bryan,
>>
>> I'll await more info! BTW, keep PerfMon running and showing that
Queue
>> Length to be sure it does not change when the problem occurs.
>>
>> Daniel Donnelly
>> ________________________________________________________
>>
>> ----- Original Message -----
>> From: "Bryan Cowell" <[EMAIL PROTECTED]>
>> To: <[EMAIL PROTECTED]>
>> Sent: Friday, December 15, 2000 11:21 AM
>> Subject: Re: [IMail Forum] Services stalling out
>>
>>
>> > Thanks Daniel for the quick response.
>> >
>> > NT Auditing is disabled.
>> > Logging is disabled.
>> > No other software is running on this machine. Just the typical NT
>> services.
>> > The Processor queue length monitor shows almost nothing.
>> >
>> > WHEN it dies again I'll check the pop3 header.
>> >
>> > ----- Original Message -----
>> > From: "Daniel Donnelly" <[EMAIL PROTECTED]>
>> > To: <[EMAIL PROTECTED]>
>> > Sent: Friday, December 15, 2000 10:54 AM
>> > Subject: Re: [IMail Forum] Services stalling out
>> >
>> >
>> > > Bryan,
>> > >
>> > > When this happens and you get the response from POP3, what
are the
>last
>> 2
>> > > numbers in that line? The first represents the number of
connections
>> since
>> > > service started and the last, the current number of
connections to the
>> > > service. The last is usually a small number (1-10) unless you
have a
>> very
>> > > large number of users, or something is leaving connections
open, or
>> > > something is causing the connections to take significantly
longer than
>> > > normal to close.
>> > >
>> > > Do you have NT Auditing enabled? How about IMail logging (for
any/all
>> > > services)? You might try disabling these, to see if that has any
>effect.
>> > >
>> > > What other programs or services are installed and/or running
on this
>PC?
>> > Any
>> > > AntiVirus software?
>> > >
>> > > Attached is a setting for Performance Monitor that checks the
>Processor
>> > > Queue Length. If this shows above 20 (average between 0-20
should be
>the
>> > > expected) on the graph, for more than short periods of time,
then NT
>is
>> > not
>> > > completing tasks in a normal manner and you need to find out
what is
>> > slowing
>> > > this down. MS site may have more on this subject.
>> > >
>> > > I tried connecting to both POP3 and SMTP service, but all seemed
>pretty
>> > > normal when I did.
>> > >
>> > > Daniel Donnelly
>> > > ________________________________________________________
>> > >
>> > > ----- Original Message -----
>> > > From: "Bryan Cowell" <[EMAIL PROTECTED]>
>> > > To: <[EMAIL PROTECTED]>
>> > > Sent: Friday, December 15, 2000 10:08 AM
>> > > Subject: Re: [IMail Forum] Services stalling out
>> > >
>> > >
>> > > > I too am having similar problems, Dual PII 500 256MB Tons
of free
>> > space,
>> > > > dedicated server. The pop3/smtp services remain active
and running
>> but
>> > > > doing a telnet to port 110 gives me my welcome message but
never
>makes
>> > it
>> > > to
>> > > > the point where entering a username is possible. Since the
service
>is
>> > > still
>> > > > running, monitor and other 3rd party utils think it's still
it's
>> > working.
>> > > > Stopping and restarting the service clears it up....for a
while.
>> > > >
>> > > >
>> > > > ----- Original Message -----
>> > > > From: "Jeff Knight" <[EMAIL PROTECTED]>
>> > > > To: <[EMAIL PROTECTED]>
>> > > > Sent: Wednesday, December 13, 2000 7:24 PM
>> > > > Subject: [IMail Forum] Services stalling out
>> > > >
>> > > >
>> > > > > Hello,
>> > > > >
>> > > > > Background: I am running iMail 6.05 on NT 4 sp6a. PII
450, 128
>MB
>> > ram,
>> > > > 4+
>> > > > > GB free on an 8 GB SCSI drive. The mail files themselves are
>being
>> > > stored
>> > > > > via a SAMBA share on a Linux box via a UNC address.
>> > > > >
>> > > > > Often, 2 -5 times each day all the service seem to die on
the mail
>> > > server.
>> > > > > POP3 sessions stall, Web messaging sits for 10-15 minutes
trying
>to
>> > > login.
>> > > > > Those are the services that are the most noticeable.
There is
>less
>> > than
>> > > > 10%
>> > > > > CPU usage at this time and less than 60 MB of memory
being used.
>> > > > >
>> > > > > Stopping all services in Imail administrator and
restarting the
>ones
>> I
>> > > > need
>> > > > > SMTP, POP3, IMAP, IMONITOR, PSERVE, WEB, etc seems to
work for a
>few
>> > > hours
>> > > > > but I usually end up having to reboot the box.
>> > > > >
>> > > > > I recently doubled the Virtual Memory to 256 MB which
seemed to
>help
>> > for
>> > > > > about 2 weeks. But the problem is back.
>> > > > >
>> > > > > Has anyone dealt with this sort of thing before ? I
could use
>some
>> > > > advice.
>> > > > >
>> > > > > Jeff Knight
>> > > > > INFOWEST
>> > > > > [EMAIL PROTECTED]
>> > > > >
>> > > > >
>> > > > >
>> > > > > Please visit
http://www.ipswitch.com/support/mailing-lists.html
>> > > > > to be removed from this list.
>> > > > >
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>> > > > >
>> > > >
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