Re: event 9791 suddenly showing up
- From: "John Fullbright [MVP]" <fjohn@donotspamnetappdotcom>
- Date: Thu, 22 Feb 2007 19:07:01 -0800
The version store is an Exchange in memory structure that is maintained for
the purpose of tracking changes to the database. The version store is used
for roll-back of transactions, for write-conflict detection, and for other
tasks.
The version store entry for a specific operation is cleaned up only one time
when the following conditions are true:
. The transaction that owns the operation has been either committed or
rolled back.
. All the transactions that are outstanding at the time that the
operation was performed have been either committed or rolled back.
If you have a long running transaction you could potentially fill the
version store. An example would be a long running backup going while
mailbox policicies are firing off deleteing a bunch of mail (the long
running task is the backup and the mailbox policy is adding a bunch of
entries to the version table).
In this case, it appears the background cleanup task (part of online
maintenance) decided not to clean up the deliveredto table (as part of
purging indices) because the version table was growing too large. In this
case I would look for an overlap of mailbox policies with background
maintenance.
John
"prolix21" <prolix21@xxxxxxxxx> wrote in message
news:1172179905.606467.180330@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
In the past 24 hours this error has been showing up repeatedly on one
of our exchange servers. This just started and usually after a while
the system becomes unresponsive, and a restart of Exchange services is
required.
No new patches or changes have been made. No other servers in my data
center are experiencing this issue, and the only difference between
this box and any others is that the users on this system use
activesync. No idea if its related or not and I'm not having much luck
tracking down this event ID. These activesync errors are the only
other errors in our event log, however they could be completely
unrelated.
======
Event Type: Warning
Event Source: MSExchangeIS Mailbox Store
Event Category: Background Cleanup
Event ID: 9791
Date: 2/22/2007
Time: 4:14:18 PM
User: N/A
Computer: GINGEXCH1
Description:
Cleanup of the DeliveredTo table for database 'First Storage Group
\<store>' was pre-empted because the database engine's version store
was growing too large. 0 entries were purged.
For more information, click http://www.microsoft.com/contentredirect.asp.
======
The activesync errors that also show up are as follows (again, may not
be related or important):
======
Event Type: Warning
Event Source: Server ActiveSync
Event Category: None
Event ID: 3007
Date: 2/22/2007
Time: 4:06:59 PM
User: DOMAIN\<user>
Computer: EXCHANGE1
Description:
Exchange mailbox Server response timeout: Server:
[exchange1.domain.local] User: [user@xxxxxxxxxxxx]. Exchange
ActiveSync Server failed to communicate with the Exchange mailbox
server in a timely manner. Verify that the Exchange mailbox Server is
working correctly and is not overloaded. For more information, see
Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
.
- References:
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- From: prolix21
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