Amount of memory that can be accessed

Question

Is there a limit of memory that can be allocated and accessed with Visual C++ 2013 -- 64 bit?

Answer 1

Yes. That limit will vary from machine to machine depending on how much virtual memory is available. The operating system will do what it can to allocate a contiguous block if your program is asking for it. That's why when allocating your memory you always need to have error checking in case the memory can't be obtained.

Answer 2

Thank You.  I guy I talked to said that the limit was like 192 gigs.  But if I have a 512G machine, I can get close to 512 gigs right?

Answer 3

Is it still ok to use malloc?

Answer 4

Here is the answer for various versions of Windows 7. I assume you are building for C++ native.

https://social.technet.microsoft.com/Forums/windows/en-US/5a518386-27a8-46fa-a85a-678b7c25358e/physical-memory-limits-windows-7

I think 192 GB is the upper limit for virtual memory size. If you need more than this, you can try LINUX.

Is it still ok to use malloc?

malloc is the same as new. It needs a continuous block of memory to allocate from the heap. 

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