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RAM Charger 8 For Macintosh
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What is RAM Charger (RC)?


(Tech0002A -- 03/11/98)
Not Just More Memory, Better Memory!

A Macintosh using RAM Charger operates more efficiently:

  • It can open more applications at the same time. 
  • It has fewer mysterious "out of memory" errors. 
  • It doesn't require continual adjustments to application's "preferred" sizes in the Finder Get Info window
  • Works with virtual memory enabled (explaination here).
RAM Charger provides these benefits by opening each application in a minimal size while giving it the new ability to grow and shrink while it operates. This functionality is helpful no matter how much memory a Macintosh has, and is only available to Macs using RAM Charger.

This page offers a more details about what RAM Charger does and how it works. A simple description using an "analogy" is available here. For more in depth information, see our manual, our technical discussion, or check out Daniel Knight's "Macintosh Online Technical Journal" web page on RAM Charger for an independent perspective.

Traditionally, when a Macintosh application starts up it must reserve exactly the amount of memory it will use. Users must configure each application, using the Finder's File/Get Info window, to reserve enough memory to accommodate the largest amount of work (documents/spelling etc.) ever done using that application. Otherwise, users risk running out of memory in the application no matter how much unused memory is outside the application's reserved space.

"About This Mac" Bars showing traditional applications limited to 2048K and 3000K no matter how much memory the Mac has, while also hording about 3000K of unused memory. 


(From Get Info Window)


With this "Fixed Limit" on an application's memory usage, it is very desirable to reserve plenty of memory for the application. Should the application use all of its reserved memory you are in a bind. At best you must quit, increase the reserved size, and start back up to get your work done (at worst your application will have crashed when it ran out of memory). This interrupts your train of thought, and wastes valuable time. Even worse, unless you shrink the reserved size back down after the quitting the application, you have now increased the amount of memory the application will reserve each time you start it from then on!

Using these old fashioned memory techniques, you're damned if you do and damned if you don't. If you reserve enough memory for applications to avoid running short, you waste a lot of memory. If you reserve the least amount of memory for applications to avoid the waste, you risk running short. We have found that the average configuration handles this balancing act by having applications reserve more than double the memory they need to start - and many still run out of memory. On the dramatic side, many Photoshop users reserve more than 10 times (32 Megabytes) of unused reserve space! What if they are only opening medium images on a given day?

With RAM Charger, applications are not limited to the fixed amount of memory they start with, instead they have access to all the unused memory currently available. As a result, applications can be started smaller, using only the amount of memory they require. Then, they may grow and shrink while they operate, leaving unused memory to be shared between all applications.

More About This Mac bars showing RAM Charged applications using only what they need at the moment, yet able to access all unused memory (fuzzy end  on bar indicates it can grow) should they need it. The 3000K no longer being reserved by the applications is now available for any pupose. 

RAM Charger is the only product that gives apps memory as needed. As a result, RAM Charged applications can start using only the amount of memory they need, and grow and shrink while running. This accommodates any amount of work done on a given day, without having to waste space with large application reserves.

Because RAM Charger distributes memory dynamically, you can keep more applications and documents open without getting "out of memory" messages opening applications. All unused memory is available to all applications and is used only when it is actually needed, reducing "out of memory" messages within applications. For the first time--ever--you can use the liberated space for opening documents in any application, not just applications open with excess reserves.

RAM Charger lets today's hungry applications use all your memory!


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Please direct corrections and comment to RAMCharger (at) RAMCharger.com

Copyright © 1995-98 Jump Development Group, Inc. All rights reserved. Jump, OptiMem, RAM Charger, and More About This Mac are trademarks of Jump Development Group, Inc. Apple and Macintosh are registered trademarks of Apple Computer, Inc. All other trademarks are the property of their respective holders.