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Exchange slow to send mail internally...

Posted on 2006-06-09
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Last Modified: 2008-02-07
Just lately in the past few days exchange has become very slow to send out mail, even the internal ones. If you send yourself a test message it can take up to 12 minutes to arrive, whereas it was almost instant before.

Is there anything in particular that would cause this?
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Question by:wlandymore
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10 Comments
 
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Expert Comment

by:questionforraja
ID: 16870559
Use perfmon to check the database, add logical disk/Avg reads, Avg writes. and also for latency. All should be beow 20-40 ms, if its constantly touching 100 ms. Its a Disk problem

Check the SMTP connectors and find out where the messages are delayed, if its delayed for directory lookup it could be a GC\DC issue. Check for any errors in Eventlog.

Check database size. Exchange version ????, how many EX servers, AD version, Hw many sites ???
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Author Comment

by:wlandymore
ID: 16870566
one Exchange 2003 server, 2003 domain, one site
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Author Comment

by:wlandymore
ID: 16870599
the only error in the event log was:

Event ID: 9671 - MSExchangeIS
User has exceeded the allowed maximum number of simultaneous registrations for MAPI notifications.
The configured maximum number of event notification registrations is 8.

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Author Comment

by:wlandymore
ID: 16870727
I also took a look at the performance and the only one that was higher was for memory (pages/sec). The ones that you had mentioned all fell within the normal ranges.
Ocasionally the pages/sec would have a spike in it that would send it up to something like 20, but would usually fall afterwards to about an average of 2.
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Expert Comment

by:questionforraja
ID: 16870824
What about the SMTP queues.
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Author Comment

by:wlandymore
ID: 16870953
there was only one thing in the queue. There doesn't seem to be anything blocking it up or I would probably see a little more in there I would think...
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Author Comment

by:wlandymore
ID: 16871106
In the system manager queue you can see everything is green and happy and there doesn't seem to be anything that shows a problem. I'm starting to wonder if the database is somehow becoming corrupt or something...
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Author Comment

by:wlandymore
ID: 16872095
Okay, I spent the morning running the disk defragmenter about 4 times in a row and after that everything was working perfectly.

I didn't think that would have an effect on Exchange, but there you go.

Thanks for the help....
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