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Windows 7: Using heaps of ram

09 Sep 2010   #11

64-bit Windows 8.1 Pro
 
 

What specific problems are you actually having??


My System SpecsSystem Spec
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09 Sep 2010   #12
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

If you are referring to the cache as "preallocated" RAM, then you are right. That cache (the dark blue in Process Monitor) is indeed always available. If one of your programs needs that RAM, the cache will be purged to the extent additional RAM is needed for an active program.
My System SpecsSystem Spec
09 Sep 2010   #13

Windows Server 2008 R2
 
 

Quote   Quote: Originally Posted by win7jak View Post
Hey thanks everyone. I'm so pleased to hear from you all and to hear your comments and thoughts.

It still concerns me that the system will pre-allocate ram. Does that mean I dont have access to that ram other than for what "it" expects i will use it for?. I use the system for photography and video editing and I need heaps of ram for that. So whats the score about the pre allocation? Is it waiting to be used by any program that fires up or set aside for a program it expects to use it. What if the anticipated prog dosn't use the ram? Sorry to be a bore.
It's a cache, pure and simple. If you have other apps that need it, Windows will get out of the way and let your apps use the RAM - however, it is actively trying to learn how you use your system, so that it can actually cache what you do use regularly, in that cache. It isn't something you will ever need to worry about - superfetch cache is just that, a cache. It will only use memory for superfetch if there are no other demands for that memory - if there ever is a demand for it, superfetch gets out of the way (assuming the demand isn't for data actually in the superfetch cache, which over time should be less and less common a scenario).
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09 Sep 2010   #14

Windows 7 Ultimate x64 and Home Premium x64
 
 

Yes, a friend of mine told me about this and I wasn't really too alarmed. She informed me in the case of the x64 side, the OS would take literally half of it and cache it. I actually was more concerned with how much in general was actually used and considered the Cached part as a silly Virtual Ram Disk being used as Virtual memory (Yes, it sounds silly, but when you think about it... Using RAM as a virtual disk, then in turn, using it as Virtual Ram...) Could be a hack way of trying to make use of the unused RAM and improve memory usage performance as virtual ram by writing to the virtual ram disk.
My System SpecsSystem Spec
09 Sep 2010   #15
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

You are much better off to let Suprfetch manage it. And the amount of the cached RAM depends on how many program instances yo had opened previously - so it is completely dynamic. There is no set number. Here is an example of what I consider optimal - all RAM is being used:

My System SpecsSystem Spec
09 Sep 2010   #16

Windows 7 x64 Home Premium
 
 

As I understand the cached RAM is always available should the system need it and that the allocation is as transparent as if it were free.

~Maxx~
.
My System SpecsSystem Spec
09 Sep 2010   #17

Windows 7 x64 Home Premium
 
 

Quote   Quote: Originally Posted by whs View Post
Here is an example of what I consider optimal - all RAM is being used:

My Vista computer which has 3 GB of RAM does much the same thing as far as allocating RAM right down to the last few MB, but my Win 7 computer has 8 GB of RAM installed and since I'm running the same programs it caches about that same amount of RAM leaving 4-5 GB of RAM free.

~Maxx~
My System SpecsSystem Spec
09 Sep 2010   #18
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Maxxwire, What you observe is normal. If you always run the same "pattern", the cache will be similar. It will only vary and grow when you start a great variety of programs and change the LOR (location of reference) all the time.
Check the cache in the morning after system start and then again at night before shutdown - you will already see a considerable difference in cache size (provided you have done many different things during the day - surfing all day with the IE will not show that pattern).
My System SpecsSystem Spec
09 Sep 2010   #19

Windows 7 x64 Home Premium
 
 

Quote   Quote: Originally Posted by whs View Post
Check the cache in the morning after system start and then again at night before shutdown - you will already see a considerable difference in cache size (provided you have done many different things during the day - surfing all day with the IE will not show that pattern).
I just took a screenshot and I'll check it again before I shut the computer down and note the difference. Please pardon me but I haven't used IE in years why will IE not show this pattern?

~Maxx~
.
My System SpecsSystem Spec
09 Sep 2010   #20
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by Maxxwire View Post
Quote   Quote: Originally Posted by whs View Post
Check the cache in the morning after system start and then again at night before shutdown - you will already see a considerable difference in cache size (provided you have done many different things during the day - surfing all day with the IE will not show that pattern).
I just took a screenshot and I'll check it again before I shut the computer down and note the difference. Please pardon me but I haven't used IE in years why will IE not show this pattern?

~Maxx~
.
I just took IE to stand for a browser - any browser. It was not supposed to be IE specific.
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 Using heaps of ram




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