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Editorial Team
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Asked: 2026-06-12T06:41:29+00:00

I recently learned that Perl when compiled as 32bit will only address 4GB of

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I recently learned that Perl when compiled as 32bit will only address 4GB of memory despite the kernel supporting and using more via PAE.

Does PHP suffer from this as well? Do all programming languages?

Source: http://linux.die.net/man/1/perlsolaris
Validation: Half a wasted day.

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1 Answer

  1. Editorial Team

    This has been answered more generally in Memory limit to a 32-bit process running on a 64-bit Linux OS

    A short quote of the top answer there:

    A 32-bit process will only be able to access 4GB of virtual memory
    regardless of the OS. This is due to the process only being able to
    map 32-bits for memory addresses. If you do the math you’ll see that
    32-bit addresses can only access a maximum of 4GB evenif your running
    on a 128-bit os.

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