The item numbers are becoming less and less of an issues with the latest Outlook Patches, and Exchange Roll ups (Microsoft Fixed some stuff). The new numbers of Items per folder are between 5-10k now (test at your own risk and make sure). The issue with Items in a folder has to do with how Exchange reads in the folder index every time it changes. A new message basically means a reindex of the folder. This causes a heap of expensive random I/O's and means that the bigger issue with a mailbox size is not the size of the items but the number of items.
Next versions, wave 14, the numbers should hit 100,000 items for folder before you see a performance impact. ~Kevinm WLKMMAS My life http://www.hedonists.ca<http://www.hedonists.ca/> From: Sam Cayze [mailto:sam.ca...@rollouts.com] Sent: Monday, March 23, 2009 6:51 AM To: MS-Exchange Admin Issues Subject: RE: Large Mailboxes Performance Absolutely no issues here, as long as the inbox is < 2000 Items. Many 10GB mailboxes here... Olk03 and Olk07 Keep your workstation file-level virus scanners off them too. ________________________________ From: Mayo, Shay [mailto:shay.m...@absg.com] Sent: Monday, March 23, 2009 8:38 AM To: MS-Exchange Admin Issues Subject: Large Mailboxes Performance Hey, Just curious what type of performance people have had with large mailboxes on Exchange 2007. Our company has a strict email retention policy that purges email after 30 days, but we have about 200 people though that have special circumstances where they need to store email long term. We implemented an archiving product from C2C about 1 and ½ years ago which turned out to be a far less than desirable solution for our users. We have fully migrated to Exchange 2007 and are kicking around the idea of not having a 3rd party archiving system and just allowing larger mailboxes (3-10 GB) for these special users. So my question is, what kind of performance have you guys seen with mailboxes this large? Do they benefit from Office 2k7 or have they actually ran fine with Office2k3? Lastly, a lot of these users travel and will be using cached Exchange mode. So I am mainly worried about performance from large OSTs.... Thanks Shay Mayo // Systems Administrator AmerisourceBergen Specialty Group Ph. 469-365-7160 // s...@absg.com<mailto:s...@absg.com> CONFIDENTIALITY NOTICE. This electronic mail transmission may contain privileged and/or confidential information and is intended only for the review of the party to whom it is addressed. If you have received this transmission in error, please immediately return it to the sender, delete it and destroy it without reading it. Unintended transmission shall not constitute the waiver of the attorney-client or any other privilege. ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~
