Re: physical storage on disk

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I know I can allocate physical memory(RAM) by AWE. That is VirtualAlloc(,,MEM_RESERVE | MEM_PHYSICAL, PAGE_READWRITE,). It allows my application to get RAM that is never swapped by the operating system to or from disk.
The problem is that I need huge memory and I hope my app can run on low memory configuration PC. I just tried to create 4000*30000, 256color bitmap by MSPaint.exe on a 256MB RAM Windows2000 while monitoring the system memory(physical and virtual memory) status by using GlobalMemoryStatus().

When I change the bitmap size from 4000*4000 to 4000*30000, physical memory goes down to almost zero at first, then takes a long long time(60s) to swaping it to pagefile and physical memory goes up to about 10MB.

As I can tolerate a low speed to access disk(pagefile) but can not tolerate a long waiting time, so I hope I can allocate directly virtual memory(disk) as my DIB bitmap buffer by some functions. I don't know how.

William

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