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23 Αυγ 2020 · The short answer, is you do nothing. The system decides what memory gets swapped to disk and allocates space as needed. The system allocates virtual memory addresses up to ~18 exabytes so that it can then swap as needed. Note: Unlike most UNIX-based operating systems, OS X does not use a preallocated disk partition for the backing store ...
You don't. Well, except for total memory size, which you could have found with sysctl -a | grep mem (hw.memsize = 4294967296 on my machine). vm_stat displays the same information as Activity Monitor.app does, you just need to multiply the value you want by page size. Both are provided in the output.
There is a terminal command similar to free on Mac OS X... it is called top. For further information you can check out this Apple Support document. Mac OS X: How to View Memory Usage With the "top" Utility
17 Σεπ 2023 · Virtual RAM = The Swap file. When needed, your Mac will put what would normally go into RAM onto the drive itself temporarily. This is normal and nothing you have control over. Restarting the Mac will clear virtual RAM/Swap file.
14 Οκτ 2013 · The PROT_NONE has size MAXPAGESIZE and so it is created differently in the 32-bit and 64-bit versions. In the case of the 32-bit version it has 4KB size (MAXPAGESIZE for i386) and in the case of the 64-bit version 2MB (standard MAXPAGESIZE for x86_64 systems).
28 Αυγ 2022 · To properly understand how a Virtual Memory Manager does its job, it helps to understand what components comprise a VM. While the low level view of a VM are overwhelming for most, a high level view is necessary to understand how a VM works and how it can be optimized for workloads.
Linux supports virtual memory, that is, using a disk as an extension of RAM so that the effective size of usable memory grows correspondingly. The kernel will write the contents of a currently unused block of memory to the hard disk so that the memory can be used for another purpose.
