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jlmdata (IS/IT--Management)
4 Jun 08 10:15
Hello,

I have a very annoying problem here, it looks like the problem is located on all servers.

A user open his own mailbox in Outlook, the user also wants to open a shared mailbox. I do this by entering account settings and add the shared mailbox in advanced tab.

Now there is another mailbox in Outlook, the performance of that mailbox is so slow, it takes ages to open up inbox, and it takes even MORE ages to make a search in that mailbox! I can see a ballon popup saying that the connection to exchange has been dropped and waits for it to reconnect.

The user mailbox has 7000 items, 4 Gigabyte data.
The shared mailbox has 11000 items, 3 Gigabyte data.

The user mailbox works as normal, very fast actually.

If I try to open the Shared mailbox (open as single primary mailbox only) It works very fast!

Btw, outlook is run under Terminal Services. Same results with Outlook 2003 as 2007.

What is this? I really hate it!
 
jlmdata (IS/IT--Management)
4 Jun 08 10:18
Btw, this exchange server has 8 GB of RAM, so there are no memory issues here.
58sniper (MIS)
4 Jun 08 10:23
How many items are in the default Inbox? If it's over 1000 to 1500, I could certainly see a performance degradation occurring. When you get over that many items, Exchange has to keep rebuilding the view.

Pat Richard
Microsoft Exchange MVP
Contributing author Microsoft Exchange Server 2007: The Complete Reference

jlmdata (IS/IT--Management)
4 Jun 08 10:38
Both mailboxes has over 1500 items and they work VERY fast if I only open on at a time, its when opening a second mailbox the caos is comming! It seems like it doesnt matter, If I open a smaller mailbox as a second mailbox, its also slow! Im beginning to think that the Outlook or Exchange product is not designed to use multiple mailboxes at the same time.

Good
Outlook - Single FAST Usermailbox

Good
Outlook - Single FAST Sharedmailbox

BAD
Outlook - Primary FAST Usermailbox + Secondary SLOW Sharedmailbox.

BAD
Outlook - Primary FAST Sharedmailbox + Secondary SLOW Usermailbox

The above is the situation I have.
jlmdata (IS/IT--Management)
4 Jun 08 10:40
I also use Full-Text Indexing on the Store.
ntinlin (IS/IT--Management)
5 Jun 08 7:46
The MS Exchange Team posted on this exact topic a few days ago.

Check out http://technet.microsoft.com/en-us/library/cc535025(EXCHG.80).aspx

I imagine that whichever mailbox you are opening as primary is being cached so indexing etc. will happen from the local OST. Any additional ones you open have to use server resources.

Neill

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