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The new operator throws an exception while there is a large amount of physical memory

In my program, I use the new operator to allocate about 130 megabytes and an exception, but I found that more than 800 megabytes are available in the task manager. I hope to find out the relationship between the physical memory specified in the task manager and the memory that my program can use.

Another reason is memory fragmentation. When I request memory allocation, memory is required as continuous. Is there a way to find out if such continuous memory exists?

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2 answers

Physical memory <> Virtual memory.

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