Virtualize SharePoint and SharePoint Virtualization

This article contains guidance on performance and capacity planning for large-scale document management solutions. The focus of this article is on the performance characteristics of document libraries as size increases and throughput of high volume operations, such as policy update and retention. Testing conducted by Microsoft has shown that single document libraries can support tens of millions of documents. This limit should be considered as the limit for documents in a single site, site collection, and content database

Estimate performance and capacity requirements for SharePoint 2010

• Capacity management and sizing overview for SharePoint Server 2010
  This article walks you through the concepts involved in capacity management and sizing SharePoint 2010 farms, and provides an overview of the planning process.
• Capacity planning for SharePoint Server 2010
  This article provides detailed steps and procedures for planning the capacity of SharePoint 2010 farms.
• Monitoring and maintaining SharePoint Server 2010
  This article provides information about how to maintain and monitor the performance of SharePoint 2010 farms.
• Performance testing for SharePoint Server 2010
  This article provides guidelines for testing the performance of SharePoint 2010 farms.
• SharePoint Server 2010 capacity management: Software boundaries and limits
  This article provides a starting point for planning the performance and capacity of your system. This article includes performance and capacity testing results and guidelines for acceptable performance.
• Performance and capacity technical case studies (SharePoint Server 2010)
  This article provides links to key technical case study articles that contain performance and capacity details for specific environments running SharePoint Server 2010.
• Performance and capacity test results and recommendations (SharePoint Server 2010)
  This article provides links to articles that provide test results and recommendations for specific feature sets in SharePoint Server 2010.
• Storage and SQL Server capacity planning and configuration (SharePoint Server 2010)
  This article describes a process for planning storage and SQL Server capacity for a SharePoint Server 2010 deployment.

White papers describe the performance and capacity impact of specific feature sets included in Microsoft SharePoint Server 2010.

SharePoint 2010 BCS Capacity Planning Document

SharePoint 2010 Large Scale Document Repository and Capacity Planning

SharePoint 2010 Office Web Apps Capacity Planning document

SharePoint 2010 Server Caches Performance document

SharePoint 2010 Visio Services Capacity Planning document

Word Automation Services 2010 Capacity Planning Guidance

SharePoint 2010 My Sites Social Computing and Capacity Planning