If you open the Terminal and run the top command at the prompt you will find information reported on Pageins and Pageouts. Pageouts is the important figure. If the value in the parentheses is 0 zero then OS X is not making instantaneous use of VM which means you have adequate physical RAM for the system with the applications you have loaded.
change hard drive space to RAM
If the figure in parentheses is running positive and your hard drive is constantly being used thrashing then you need more physical RAM. Adding RAM only makes it possible to run more programs concurrently. It doesn't speed up the computer nor make games run faster. What it can do is prevent the system from having to use disk-based VM when it runs out of RAM because you are trying to run too many applications concurrently or using applications that are extremely RAM dependent.
It will improve the performance of applications that run mostly in RAM or when loading programs. Sep 26, This is called swapping and this is done automatically.
When you start Activity Monitor and go to System Memory you can see the page ins and page outs and how much swap space is used. Page content loaded. That's the issue I'm trying to solve really I didn't realize at purchase that I couldn't upgrae my RAM in the future, which is a big shame. I will quite often have Dreamweaver, Photoshop, Eclipse, Thunderbird etc open at the same time. I haven't had a lot of trouble but the memory does run very low with these open at the same time.
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Such lack of faith! Not only is using disk space as RAM possible, it's always happening, as needed.
You can't even completely turn it off without hacking the system. You mentioned Photoshop Also, if you did want more control over which disk OS X uses for the VM swap file, you can reassign it using the command line.
What is Virtual Memory on the Mac? - fiohenchfescambress.cf
Thanks for the tip regarding Photoshop, I'll certianly give that a go. RAM is fast physical memory.
VM is much slower swappable memory, located on a disk drive. When needed, a Mac will dynamically allocate additional virtual memory, and you can do little to tune VM allocation. However, keep in mind that a Mac uses free disk space as virtual memory, so a full boot disk can cause problems.
Press and hold the "Command," "Option" and letters "P" and "R" on your Mac keyboard as you start the computer.
- Tip # 1. Remove Login Items to lower Mac memory usage;
- Apple Footer.
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Listen for the second set of chimes and release. Free additional disk space on your boot volume. VM on a Mac requires free disk space on your startup disk. Calculate this number by multiplying your desired size of disk in megabytes by Input this number in place of the X characters in the command above:.
After a brief moment, the system will create and mount your RAM Disk. You can now read and write to it as you would with any other drive, as long as you remember that any data stored on the disk will be lost after a reboot or power loss.
How to Create a 4GB/s RAM Disk in Mac OS X
For an even easier method, you can use a third party app to create a RAM Disk. Download the app and launch it on your Mac. It will ask you two questions: With both methods, you can get rid of the RAM Disk by ejecting it or rebooting. Again, make sure that all data on the disk is backed up before doing this; the data will be irrevocably lost once you reboot or lose power.
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