Hm. You're stretching several boundaries beyond their limits there:

The 32bit memory mapping system supports either 4GB of address space without PAE or 64GB with PAE. But that does not necessarily tell you how much Linux supports with/without PAE.

Linux also introduces constraints on total physical memory based on interactions with the way it manages kernel virtual memory. That leads to at least four different levels of memory support based on choices made during kernel build.

The lowest level is 896MB without PAE
The next level is about 3.25GB (bios limited) without PAE
The next level is, I think, about 16GB, with PAE

The highest level, I think, is the full 64GB with PAE plus an ugly kludge in kernel virtual memory (I think a bad idea. Use 64bit instead for that much ram).

Win32 can also (and I believe was first) to do Page Address Extension (PAE). It can also extend the default 2GB user space to 3GB per process. But just like linux, these limits are extended through a series of cludges that have drawbacks as well as benefits.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

The start of some sanity?

In reply to Re^3: Efficient way to handle huge number of records? by BrowserUk
in thread Efficient way to handle huge number of records? by Anonymous Monk

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