The release of SharePoint 2010 Products marks a substantial change in the way Microsoft approaches capacity and performance documentation. We have listened to feedback and learned from customer experiences with SharePoint Server 2007 and our own testing to establish a comprehensive set of initial guidance for capacity and performance management for SharePoint 2010.
We have published a Capacity Management Resource Center (http://technet.microsoft.com/en-us/sharepoint/ff601870.aspx ) that will help you find the content you need. You can start with the Capacity Management Sizing Overview (http://technet.microsoft.com/library/cc261700(Office.14).aspx ) to help you get started with capacity management concepts and the 5 steps to properly size, design, deploy, monitor, and maintain your environment. Other content available now includes SharePoint Server 2010 boundaries and limits (http://technet.microsoft.com/library/cc262787(Office.14).aspx ), Storage and SQL Server capacity planning (http://technet.microsoft.com/library/cc298801(office.14).aspx ), technical case studies of production SharePoint Server 2010 environments, and recommendations for specific features and services. More content will be added in the coming weeks and months, so make sure to check back often for new white papers and articles.