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Windows 7 Prefetch and Paging System

post #1 of 5
Thread Starter 
Well, I've heard there is no need to enable the prefetching service when switching to SSD. Is this correct?

Also, since using 8gb of memory, I've disabled the paging system entirely as well, since it's very hard to use up all 8 gb of memory.

Does either of these 2 functions disabled help or hinder the system?

I noticed in windows task manager, it's now cached all 8gb of memory with 0 free memory, however with 6714 available. like this...

Physical Memory (MB)
Total 8104
Cached 6755
Available 6713
Free 0
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post #2 of 5
Quote:
Originally Posted by malkion View Post
Well, I've heard there is no need to enable the prefetching service when switching to SSD. Is this correct?

Also, since using 8gb of memory, I've disabled the paging system entirely as well, since it's very hard to use up all 8 gb of memory.

Does either of these 2 functions disabled help or hinder the system?

I noticed in windows task manager, it's now cached all 8gb of memory with 0 free memory, however with 6714 available. like this...

Physical Memory (MB)
Total 8104
Cached 6755
Available 6713
Free 0
I think you should enable pagefile. With SSD, superfetch might stay off, but pagefile also prevents RAM errors, so it'd save you some BSODs

(prefetch is a part of Windows and is always on. Superfetch can be turned off, if you feel it hinders performance)
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post #3 of 5
Prefect and superfetch, despite being much lauded, are useless on SSDs, and of marginal value even with HDDs. I disable both on most of my systems, with no loss of performance.

That cached value you see using up a good chunk of your memory is simply the dynamic system cache that exists independent of prefetch/superfetch. It buffers frequently used data, or stuff being read/written to drives and can be freed immediately on demand. It's not hurting anything.

Some sort of pagefile should always remain enabled to handle those programs that expect it. However, it should not be placed on an SSD. Even with 24GiB of RAM I have several small pagefiles totaling about 2.5GiB (that windows can expand to about 30GiB, if needed) spread over my HDDs. They are almost never used, so don't hurt performance in anyway, but I do run some apps that demand them and would lock my system were they not there.
Edited by Blameless - 7/28/11 at 6:46am
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post #4 of 5
If you make a fresh install on an SSD, Windows 7 will automatically disable SuperFetch and ReadyBoost services.

For the page file, you could disable it with 8GB of ram. Some programs may complain or not run without a page file. Chances are you won't get that problem. If you want to be "safe," just make a 1GB page file. Windows is designed to be used with a page file.

I run programs that routinely use up almost all of my 12GB of ram so I still need a page file. I might just get 24GB.
post #5 of 5
Thread Starter 
yeah, actually I left a small 400MB page file on the boot/OS drive. Windows gives a warning for anything less than that.

So I'll go ahead and disable the prefetch/superfetch service as well then.

As long as there is no loss of performance, I'm cool widdit.

Previously, I always went with the 1.5x memory for paging file off the os drive. Then knocked it down to just 4GB after upgrading to 6GB of memory.
Edited by malkion - 7/28/11 at 6:52am
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