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Exchange 2010 SP2 - Excessive Transaction Logs

Ugh.  This is an ongoing issue I'm trying to understand.  Here are the facts:

1. We have about 80 users and a single 165GB mail database.  All servers are on a single box (hub, transport, client access).

2. Probably 25-30 users have iPhones (all 4 or 4S).  Maybe 20 users have Android phones.

3. We are generating between 4,000 and 5,000 transaction logs per day.

4. We use Windows Server Backup daily for full VSS backups.  Transaction logs are truncated fine - no problems there.

5. Our Exchange server is 2010, SP2, Rollup 4 - fully updated.  It's 2008 R2 Standard with SP1.  24GB RAM. 4 x 250GB SATA 7.2k set up in a RAID 10.

My questions are:

1. I'm not sure of our daily mail volume, but it is not excessive.  The 165GB mail database is for 80 users over the course of 2 years or so.  Does 4,000+ daily transaction log files seem excessive ?  I would love to hear what is considered "normal" or "average" for a similar environment. Please share :-)

2. I've run ExMon numerous times.  There are no individuals who stand out - everyone seems to be generating log bytes in large amounts intermittently.  I know iOS devices are known to pound away at the server, but log bytes seems to come from users with Android devices equally.  Short of disabling ActiveSync, is there something else I can try ?  Changing ActiveSync pool settings ?

3. Most of the cell phones in our organization have WiFi turned ON and are always connected to our network via WiFi.  Can there be any conflict between the devices using ActiveSync through their phone services and WiFi ?

4. The log files reside on the same volume/folder as the mailbox database.  We recently installed a new iSCSI SAN, so will probably be splitting the database and moving the logs to it's own pool/spindles.  Any chance this would help with the transaction log issue ?

Thanks much.
-Stephen
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lapavoni
Asked:
lapavoni
1 Solution
 
Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
1. I'm not sure of our daily mail volume, but it is not excessive.  The 165GB mail database is for 80 users over the course of 2 years or so.  Does 4,000+ daily transaction log files seem excessive ? - I dont think its excessive :)

I would love to hear what is considered "normal" or "average" for a similar environment. Please share :-) - I dont think anyone can give you any clear comment as it totally depends on the Users email frequency and Org needs .... remember that Application servers also do use email relay and sending so dont forget that :)

2. I've run ExMon numerous times.  There are no individuals who stand out - everyone seems to be generating log bytes in large amounts intermittently.  I know iOS devices are known to pound away at the server, but log bytes seems to come from users with Android devices equally.  Short of disabling ActiveSync, is there something else I can try ?  Changing ActiveSync pool settings ? - I dont think there is any need to do so its their normal behavior as its a Sync process. Just check if they arent using any 3rd party App to connect to Mailbox if any specific user is causing issue randomly.

3. Most of the cell phones in our organization have WiFi turned ON and are always connected to our network via WiFi.  Can there be any conflict between the devices using ActiveSync through their phone services and WiFi ? - Nopes

4. The log files reside on the same volume/folder as the mailbox database.  We recently installed a new iSCSI SAN, so will probably be splitting the database and moving the logs to it's own pool/spindles.  Any chance this would help with the transaction log issue ? - Wouldnt make any difference and but its a very good move and Practice :)

- Rancy
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johan_vCommented:
Hi,


Did you also had a look at this technet article:

http://technet.microsoft.com/en-us/library/ff477617.aspx

Regards,
Johan
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lapavoniAuthor Commented:
Good answer to each question. Thanks.
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