Large File Support and Unused BLOB Cleanup Timer Job
Select Yes or No for Include Large File Scanning. Yes will include the BLOBs and stubs created while using the Large File Upload in the scan for content to be removed. No (default) will ignore them.
If Large File Support is enabled, the Unused BLOB Cleanup job scans all content for orphaned BLOBs. If a Site Collection has recently been deleted, SharePoint doesnt delete it until the Gradual Site Delete timer job has been run. The Unused BLOB Cleanup job may return errors until the deleted site collection is removed by SharePoint. It is recommended that the Gradual Site Delete timer job be run manually, after deleting a Site Collection.
Troubleshooting
Problem: Im having problems with large files in SharePoint
Problem: Im getting request timeouts dealing with large file operations
1.Make sure the Maximum Upload Size setting on the Web application general settings page for the web application in question is set to a value larger than the file(s) being uploaded.
2.Use the multi-file upload option vs. the single-file upload option even if uploading a single file.
3.It could be a request timeout. See Microsoft knowledgebase article number 925083 for information on addressing this issue.
a.Optionally, add the following node to the LAYOUTS\web.config to catch other operations (check-in, version restore, etc.):
<configuration>
<system.web>
<httpRuntime executionTimeout=999999 />
4.If SharePoint (WSS or MOSS) web front-end server(s) is running on 32bit versions Windows 2003 or 2008, consider moving to a 64bit version.
Using Large File Support
Please see the Large File Support document, found by clicking the Help link on the Large File Upload page.
Large File Support and My Sites
If not already enabled, make sure the ID that is upgrading the farm has full control for the Web Application hosting the My Site Host. (Select the Web App, User Policy>Add user.) If enabling this access is not preferred, temporarily add the ID, then disable externalization on the StoragePoint profile, save it, enable externalization on the profile, save it, and remove the user from the Web App user policy when complete. Otherwise, my site users may see an error when they try to use the large file upload window on their my site.