Product
Windows Operating System
ID
106
Source
Microsoft-Windows-Diagnostics-Performance
Version
6.1
Message
Background optimizations (prefetching) took longer to complete, resulting in a performance degradation in the system start up process:
Name : BackgroundPrefetchTime
Total Time : 39992ms
Degradation Time : 54619ms
Incident Time (UTC) : 2011-02-04T07:58:09.734000400Z
Prefetch is a feature, introduced in Windows XP, that stores specific data about the applications you run in order to help them start faster. Prefetch is an algorithm that helps anticipate cache misses (times when Windows requests data that isn’t stored in the disk cache), and stores that data on the hard disk for easy retrieval.
As new applications are subsequently started, new prefetch data will be created, which may mean slightly reduced performance at first.
Note that deleting Prefetch data may increase boot time slightly, but only the next time you boot Windows. Each subsequent boot should proceed normally, since the prefetch data will already be present for the programs.
Note: You will not improve Windows performance by cleaning out the Prefetch folder. You will degrade Windows performance by cleaning out the Prefetch folder
The Prefetcher’s configuration is stored in the Windows Registry at
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters.
The EnablePrefetcher value can set to be one of the following:
• 0 = Disabled
• 1 = Application launch prefetching enabled
• 2 = Boot prefetching enabled
• 3 = Applaunch and Boot enabled (Optimal and Default)
Ed Price - MSFT edited Revision 10. Comment: Bullet
Ed Price - MSFT edited Revision 8. Comment: HTML cleanup
Ed Price - MSFT edited Revision 7. Comment: Headers
Ed Price - MSFT edited Revision 6. Comment: Headers
Fernando Lugão Veltem edited Revision 2. Comment: added toc and tags and update font styles
When you search Online from the Event Viewer Report this Report is not provided. Why not?