[ExchangeList] Re: Exchange server delivery latency: need help!

  • From: "Gary LaFontaine" <GLaFontaine@xxxxxxxxxxxxxxxxxxxx>
  • To: <exchangelist@xxxxxxxxxxxxx>
  • Date: Tue, 24 Apr 2007 13:09:06 -0500



I am new to this list.  Could you tell me more about this Exchange
Troubleshooting Assistant Tool?






Gary LaFontaine



From: exchangelist-bounce@xxxxxxxxxxxxx
[mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Tony Afriyie
Sent: Tuesday, April 24, 2007 12:59 PM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Re: Exchange server delivery latency: need help!


I am glad that you're at least aware of the Exchange Troubleshooting
Assistant but sorry to say that it doesn't look like you've been trying
to use it. The Exchange  Troubleshooting Assistant tool automatically
determines what set of data is required to troubleshoot the identified
symptoms and collects configuration data, performance counters, event
logs and live tracing information from an Exchange server and other
appropriate sources. The tool analyzes each subsystem to determine
individual bottlenecks and component failures, then aggregates the
information to provide root cause analysis.




From: exchangelist-bounce@xxxxxxxxxxxxx
[mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Jabber Wock
Sent: Tuesday, April 17, 2007 11:20 PM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Re: Exchange server delivery latency: need help!


Hi Tony,


Yes, quuite familiar with the BPA and also the Exchange Troubleshooting
Assistant.  But thanks anyway.




On 4/16/07, Tony Afriyie <tony.afriyie@xxxxxxxxxxx> wrote: 


  Are you familiar with Microsoft Exchange Best Practices Analyzer Tool?
You may wanna download it from Microsoft website and run it on the
Exchange Server to find out what could be possible causing this latency
on your server. 


Here is the link to download the tool:





From: exchangelist-bounce@xxxxxxxxxxxxx
[mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Jabber Wock
Sent: Sunday, April 15, 2007 12:16 PM
To: [ExchangeList]
Subject: [ExchangeList] Exchange server delivery latency: need help!




I have an Exchange 2003 server which has started experiencing
significant latency (lag) in message delivery in the past 2-4 weeks.
Some users (not all) are reporting that messages are taking many
minutes, sometimes 20 minutes to an hour to arrive.  This is true for
internal email (sender and recipient both on this Exchanges erver) or
external email (emails from outside being delivered to Exchange user, or
Exchange user sending to an external user). 


I have defragged the store, and also tried moving mailboxes to another
store.  I have checked event logs for any clues but don't see anything
that would imply an issue.  The queue is typically very small, 50 to 100
messages, all small in size and mostly to non-deliverable external
addresses which does not sound like it should be holding up everyone
else.  The server typically processes 10000 to 20000 emails per day so a
queue of 90 should probably be OK.  RAM usage is less than 50% of
physical memory (4GB real, about 1.7GB typically used, store.exe is
using maybe 800MB to 1.2GB).  No disk errors or issues in the event log.
The server CPU is a Xeon 3GHz and CPU utiliztion is always quite low,
around 10-15%.


This behavior is relatively recent, perhaps in the last 2-4 weeks.
Server traffic has not changed noticeably during that period, i.e. SMTP
log files are about the same size they have always been, bandwidth usage
is about the same over the past 6 months etc.  Also, not all users are
reporting the issue, but there is no obvious pattern to them ( e.g. all
on one store, or one OU in the AD etc.).


I did notice that when I was moving mailboxes from one store to another,
it was slow as molasses.  It took 3 hours to move 10 mailboxes, none of
which were "huge" (maybe 50MB to 300MB in size).  That seems odd, I
would have expected the mailbox move (in ESM) to whizz by at amazing
speeds especially on a Sunday morning. 


Any suggestions as to what I should look at to analyze where the latency
in delivery is?  Are there any tools (apart from "Windows Performance
Monitor" which I ran but did not show any obvious issues)?  Are there
any tuning suggestions for Exchange message delivery? 


Any help would be appreciated! (other than "google is your friend" or
"go buy some books" thanks LOL).


best regards

J. W.




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