MsExchange Blog Spot Telnet25

May 10, 2010

What is your Item Count?

Filed under: General — telnet25 @ 2:21 pm

I hear you are performing troubleshooting on your exchange server and you come cross not the size of mailbox the item count in critical path folders makes the difference. If you did not know this keep reading as I know you will find this post very useful.

Exchange 2000, 2003 and 2007 suffered from I/O fear long time due to new optimized and improved  structure of ESE providing shooter and sequential I/O’s

Exchange does many small, random input/outputs (I/Os) which allows Exchange 2010 to use JBOD configuration with cheap disk ( SATA)

  • Store Schema changes
  • DB I/O size improvements
  • Database cache effectiveness improvements
  • ESE optimizes for new schema

Results:

E2010 reduces the I/O by additional 70% when compared to E2007 and 160% compared to Exchange 2003.

Large item count per folder is an issue due to restricted views (affects large mailbox deployments)

Schema changes of the table structure and deferred index updates greatly improves restricted view performance

Result: Supports 100,000 items per folder

  • Outlook Personal Folder Files (PSTs) are a litigation, security, and management nightmare
  • New Messaging Records Management features
  • Item level policy settings
  • Archive mailbox feature for importing and storing PST data
  • Compliance Officer search capabilities

Result: PSTs can be removed by placing data into Exchange repository and can be searched easily.

After al these good information you decided to look to see what is the item count on your mailbox. Remember you will need to take into consideration of critical path folders which the folders are.

  • Calendar,
  • Contacts,
  • Inbox
  • Sent Items

Version Folder limits

Exchange 2000/2003 5000
Exchange 2007 20.000
Exchange 2010 100.000

image

Click here to download

Get-Mailbox -identity dedealoc -ResultSize ‘Unlimited’ | Get-MailboxFolderStatistics | Select-Object -property ‘Date’, ‘Name’, ‘FolderPath’,’ItemsInFolder’, ‘FolderSize’

 

image

Note: after installing PGUI if this is your first time and you have no clue what to do

  • make right click on PGUI select new Folder
  • Name the folder anything you like click Apply on the bottom

image

image

Now I assume you download the PS1 I uploaded on my website to your desktop.

Now on the folder . new Script node

image

image
Click open on the file picture  brose the PS script and bring it into PGUI

image

Give it a name and click Apply to save it

image

As you see it runs as soon as you click on it

image

PGUI is the *BEST* tool out there and as you can see it is so efficient and easy to use. You can collect your own PS scripts and make PGUI even more efficient for your environments. At this point export the report to CSV and calculate the folder items mentioned earlier to get the item count.

You can find out your heavy users and educate them how to lessen the  these folders or perhaps go for Exchange 2010 (-: and not worry about 20.000 item count limits at all

Best regards,
Oz Casey , Dedeal
MCITP (EMA), MCITP (SA)
MCSE 2003, M+, S+, MCDST
Security+, Project +, Server +
Http://smtp25.blogspot.com (Blog
Http://telnet25.spaces.live.com (Blog)
Http://telnet25.wordpress.com (Blog

Advertisements

Leave a Comment »

No comments yet.

RSS feed for comments on this post. TrackBack URI

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Create a free website or blog at WordPress.com.

%d bloggers like this: