bansalnvn
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RepOliviaJBlack, Consultant at Apkudo
I am Olivia from San Diego. I am working as a checker in the Thom McAn Store company. My strong ...
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In Some OS the size of virtual memory allocated to all the processes cumulative is equal to the total physical memory and the swap space configured. (e.g. Solaris).
- bansalnvn January 28, 2013But in some OS according to the word size 32 bit or 64 bit address spaces are given to each and every process. When the process try to lock or map the virtual address to real or physical address, then if the mapping can be done, It is done otherwise a run time exception occurs.
This concept is called memory overcommit. So the total virtual address given to all the processes is all the address range either 32 bits or 64 bits accordingly. But some address range is reserved for either kernel space or treated as a hole.