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Exchange transaction logs filling up

Posted on 2012-03-19
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Last Modified: 2012-03-31
Hi all,

one of the storage group transaction logs are filling up 10 GB in couple of hour.  Is there anything I can look at and troublehoot.

We have exchange 2007 sp3.  Right now I've enabled circular logging until I figure out the cause.

Thanks
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Question by:annayeg
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11 Comments
 
LVL 42

Expert Comment

by:Adam Brown
ID: 37738487
How many users do you have in your environment? How heavily is your exchange server utilized? Are your queues filling up as well?
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LVL 1

Author Comment

by:annayeg
ID: 37738778
We have about 700 users.  On this particular storage we have about 37 mailboxes.  The queu's have not filled up.
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LVL 42

Expert Comment

by:Adam Brown
ID: 37738806
http://blogs.technet.com/b/mikelag/archive/2009/07/12/troubleshooting-store-log-database-growth-issues.aspx has a lot of good information about tracking and troubleshooting log growth. See if there's something there that helps.
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LVL 1

Author Comment

by:annayeg
ID: 37739044
I am new to administrating exchange, if the backup fails to backup the storage group and committ the changes and delete the log files, that would cause the drive to fill up right?
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LVL 42

Expert Comment

by:Adam Brown
ID: 37739165
Yes, it would. If you're building 10GB of log files in 2 hours, it's a problem, though. If the drive that the database and logs are on is only 10GB, you'd want to look at expanding that.
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LVL 1

Author Comment

by:annayeg
ID: 37739278
The drive is 80GB.  How would I know if the backups of this particular drive are not running or failing?
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LVL 42

Expert Comment

by:Adam Brown
ID: 37739289
You would need to check your backup software for errors. The method depends on what you're using. Alternatively you can look at the dates on your Transaction logs. If they are date stamped for a significant period of time in the past, it's likely the backups are failing. If they only go back a week or so, you may want to consider scheduling more full backups. Also check to make sure that the software you're using to back up Exchange is "Exchange Aware." Some software will run successful backups, but won't remove Transaction logs for Exchange.
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LVL 1

Author Comment

by:annayeg
ID: 37739319
It has been working great until yesterday evening.  I have enabled circular logging so it only shows today's transaction logs.
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LVL 42

Expert Comment

by:Adam Brown
ID: 37739348
Ok. That means it cleared the logs for you. If you turn off Circular logging, you should be able to get a better idea of how the logs are growing at this point. See how many logs you're getting in a certain period of time. Open the log file folder after circular logging is off and just refresh the view after a bit to see how many new log files are created. This will give you an idea about estimated growth. If it doesn't grow a lot in the time you monitor it, check on it after your next scheduled full backup and view the dates on the log files. This will let you know if your backup is doing what it's supposed to.
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LVL 1

Accepted Solution

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annayeg earned 0 total points
ID: 37766495
Figured out why the logs were filling up.   Another program was running a crawl on mailboxes and it wasn't working properly.
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LVL 1

Author Closing Comment

by:annayeg
ID: 37790311
Figured out the problem.
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