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Exchange 2007 Back Presure

Posted on 2009-07-13
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Last Modified: 2012-05-07
I am trying to find information concerning the Back Presure - Version buckets. I have looked at http://technet.microsoft.com/en-us/library/bb201658.aspx but it really does not explain the Version buckets.


Event Type:      Warning
Event Source:      MSExchangeTransport
Event Category:      ResourceManager
Event ID:      15004
Date:            7/7/2009
Time:            1:46:08 PM
User:            N/A
Computer:      HUB-CAS
Description:
Resource pressure increased from Normal to Medium.

Resource utilization of the following resources exceed the normal level:
Version buckets = 171 [Medium] [Normal=80 Medium=120 High=200]

Back pressure caused the following components to be disabled:
Inbound mail submission from the Internet
Mail submission from the Pickup directory
Mail submission from the Replay directory
Mail delivery to remote domains

The following resources are in the normal state:
Queue database and disk space ("C:\Program Files\Microsoft\Exchange Server\TransportRoles\data\Queue\mail.que") = 8% [Normal] [Normal=95% Medium=97% High=99%]
Queue database logging disk space ("C:\Program Files\Microsoft\Exchange Server\TransportRoles\data\Queue\") = 8% [Normal] [Normal=95% Medium=97% High=99%]
Private bytes = 7% [Normal] [Normal=71% Medium=73% High=75%]
Physical memory load = 38% [limit is 94% before message dehydration occurs.]


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Question by:Cisp
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LVL 20

Expert Comment

by:EndureKona
ID: 24840898
This occurs when the drive that the queue is on falls to low disk space.   Move the queue to a drive that has adequate disk space.

How to move:

http://www.petri.co.il/back-pressure-moving-queue-database-in-exchange-2007.htm
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Author Comment

by:Cisp
ID: 24840932
The drive that queue is on has 213gb of free space.
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Expert Comment

by:EndureKona
ID: 24840972
This is on the C: drive of server  HUB-CAS?   that is 213GB?
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LVL 20

Expert Comment

by:EndureKona
ID: 24841036
If this is the case then do you have another drive to move it to and then back?

I believe the back pressure on RTM is less than 4GB of space then you will have email flow trouble, with SP1 I believe its 512MB

more references:

http://www.exchangeinbox.com/article.aspx?i=89

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Author Comment

by:Cisp
ID: 24841126
Unfortunately the server only has a C drive.
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