Re: System Cache

I would be glad if you pointed us to an article about this business of the file cache being on the hard disc. Lets not confuse the pagefile with the file cache. I only know of one file cache and it is in an area of the RAM. Please provide further information for the disc file cache, I would like to find out what this is all about.

John

Manfred Senn wrote:

Yes, there is a cache in the memory too, and I think this works together with the file cache. I would be glad if anyone from Microsoft would comment this ...

"John John" <audetweld@xxxxxxxxxxx> schrieb im Newsbeitrag news:%23R3Wf27FHHA.1240@xxxxxxxxxxxxxxxxxxxxxxx

I thought that the File System Cache was an area of memory which held files recently accessed on the hard drive? If the application then needs to use the same file again or write to it, it is retrieved from or written to the much faster memory cache instead of the disk. The files are held or cached until flushed to the disk.

John

msenn@xxxxxx wrote:


Windows puts an area of the size of about 80% of the RAM on the local
disk. This is the "file system cache". Windows doesn't show you this
file system cache, but you can imagine it as a large file normally on
your Drive C. When you do large file copies to your disk, you can
monitor the increasing of the cache in the task manager. In this moment
the copied files do not stay in the directory where you meant to copy
them. They are in the file system cache. This can last a long time
until the file system cache is emptied an written to the real location.
Microsoft knows that there are problems with the file system cache when
you have machines with much RAM. Maybe when you backup a system and the
file system cache is not empty there can be a loss of data. In large
domain environments, this can cause problems, if the file system cache
is to big. There may be replication problems. To fix the problem some
companies go the way and reduce the memory of domain controllers to
256MB RAM. Because then the file system cache is 80% of 256MB, and the
problems are gone. There is no way to reduce the file system cache
manually (The only way is reducing RAM). You can find registry hacks,
but they dont work.

Bob I schrieb:



No, IT'S YOU that doesn't understand, you haven't started giving it
anything in particular to do yet.

b11_ wrote:



You don't understand. After I boot the computer and reach the desktop, there
is about 1000 mb of free memory which is much more than enough to run games.
There is never a shortage of free memory!
_________________________________________________________________

"Sharon F" wrote:




On Tue, 7 Nov 2006 16:33:01 -0800, b11_ wrote:




System cache is in memory. It is not on the drive.

And as I said, this is a good thing. When your system needs to cache to the
hard drive because the RAM is needed for other tasks, it will do so. As it
stands now, your system is running optimally. No need to change anything.

--
Sharon F
MS-MVP ~ Windows Shell/User






.

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