Because of a capacity limit for the AP system in Microsoft SharePoint Server 2010, some companies may have to disable AP analytics on certain SharePoint farms. For more information about the capacity requirements, visit the following Microsoft website:
Capacity requirements for the Web Analytics Shared Service in SharePoint Server 2010
To resolve this issue, apply this following hotfix update:
2553920 Description of the SharePoint Server 2010 hotfix package (wasrvwfe-x-none.msp): June 28, 2011
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.