32bit PAE v.s. non-PAE performance
On Sun, Jan 3, 2010 at 9:42 AM, Tim Gardner <firstname.lastname@example.org> wrote:
> Gleaned from a discussion on LKML entitled 'Ubuntu 32-bit, 32-bit PAE,
> 64-bit Kernel Benchmarks'
> It appears that the performance impact of PAE is not as great as was
> originally feared (given a normal workload).
> Tim Gardner email@example.com
> kernel-team mailing list
I performed some testing a few years ago comparing 32bit PAE vs
non-PAE kernels. Performance was within 10% or less using micro
benchmarks(lmbench, tiotest, etc). The real benefit to the PAE Kernel
was seen running database benchmarks such as DB2 or TPCC(Comparing PAE
to non-PAE - excluding 64bit). For example Oracle can address up to
62GB of memory versus 1.7GB. So any applications that will benefit
from the ability to address addition memory will have a tremendous
performance boots versus non-PAE kernels.
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