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Moonwalker
Asked: 2012-02-21 15:39:42 +0800 CST

Is it possible to run 64-bit mongo db on my 32-bit pae enabled ubuntu?

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If answer is negative then which workaround would be less painful? Reinstall the system? Run mongo in virtual machine with 64bit ubuntu?

For now I need mongo only for dev purposes, but my test database consists of 3kk entities so I'm afraid virtual machine will be inefficient.

mongodb

1 Answers

  1. Best Answer

    According to the KVM FAQ while it is possible to run 32-bit guests on top of a 64-bit host, "the only unsupported combination is a 64-bit guest on a 32-bit host". So virtualisation will probably not help you in this case.

    The PAE extensions really only help if you are running many processes, each of which need less than 4GB of address space. While the extension allows the operating system to manage more memory, it is still limited by the 32-bit address space.

    If you have a single memory hungry process you really need a larger address space, which you get through a 64-bit kernel.

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