D. said:
Within the past few days ,
there are no prefetch data files
showing in %temp% .
The value is set at 3 in the registry .
I'm just curious as to why they
stopped being listed ?
TIA ,
D.
XP stores Prefetch in WINDOWS\Prefetch, not in the User Temp file
location. The files to be prefetched, their location, and order are
determined by layout.inf, which is also located in the Prefetch subfolder.
All registry values pertinent to Prefetch control only what it does or
doesn't monitor. There's no location value related to it.
http://blogs.technet.com/b/markrussinovich/archive/2009/08/10/3272210.aspx
" Introduced in Windows XP, the Logical Prefetcher is a kernel component
that monitors the first ten seconds of a process launch, recording the
directories and portions of files accessed by the process during that
time to a file it stores in %SystemRoot%\Prefetch. So that multiple
executables with the same name but in different directories get their
own prefetch file, the Logical Prefetcher gives the file a name that’s a
concatenation of the executable image name and the hash of the path in
which the image is stored e.g. NOTEPAD.EXE-D8414F97.pf. You can actually
see the files and directories the Logical Prefetcher saw an application
reference the last time it launched by using the Sysinternals Strings
utility to scan a prefetch file like this:
strings <prefetch file>
The next time the application launches, the Logical Prefetcher,
executing in the context of the process’s first thread, looks for a
prefetch file. If one exists, it opens each directory it lists to bring
the directory’s metadata into memory if not already present. The Logical
Prefetcher then maps each file listed in the prefetch file and
references the portions accessed the last time the application ran so
that they also get brought into memory. The Logical Prefetcher can speed
up an application launch because it generates large, sequential I/Os
instead of issuing small random accesses to file data as the application
would typically do during startup. "
Also see -
http://blogs.technet.com/b/sysinternals/archive/2001/08/20/452888.aspx
Specifically - Windows XP Prefetching
MowGreen
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*-343-* FDNY
Never Forgotten
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"Security updates should *never* have *non-security content* prechecked
