Excellent Blog posted on the Citrix Community Blog site about the performance of SQL Server 2008 virtualized on XenServer
Excerpt - In continuation of our virtualization performance tests with large enterprise application platforms running on XenServer, we recently completed an extensive series of performance and scalability tests with Microsoft SQL Server 2008 on XenServer 5. In the past, we successfully demonstrated the enormous server consolidation and management benefits of virtualizing Citrix XenApp 4.5 and 5.0 as well as Microsoft Exchange 2007 using XenServer. Test results for these can be found on the white paper section of XenServer/Essentials at Citrix.com: http://citrix.com/English/ps2/products/documents_onecat.asp?contentid=683148&cid=White+Papers.
The results of tests for SQL Server 2008 on XenServer were equally as impressive.
Read the full post here
The results for all tests in the project along with a detailed description of the tools and methodologies can be found at: http://citrix.com/%2Fsite%2Fresources%2Fdynamic%2Fsalesdocs%2FSQL_Server2008_XS5_WP.pdf
-Todd