When you run optimization jobs on files, files aren't fully optimized when deduplication frequently stops the optimization of large files.
A deduplication cache lock contention issue causes system performance degradation when the deduplication cache is thrashed.
This issue occurs because the optimization is tracked incorrectly with a soon-to-be-deleted old stream handle. The optimization is stopped when the old handle is cleaned up.
This issue is a result of the lock contention issue in deduplication chunk cache that's exposed by cache thrashing.
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that's described in this article. Apply this hotfix only to systems that are experiencing this specific problem.
If the hotfix is available for download, there's a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section doesn't appear, submit a request to Microsoft Customer Service and Support to get the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that don't qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website: Note The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you don't see your language, it's because a hotfix isn't available for that language.
PrerequisitesTo apply this hotfix, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows Server 2012 R2.
Registry informationTo use the hotfix in this package, you don't have to make any changes to the registry.
Restart requirementYou have to restart the computer after you apply this hotfix.
Hotfix replacement informationThis hotfix doesn't replace a previously released hotfix.
Article ID: 3094197 - Last Review: 04 Nov 2015 - Revision: 1