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    SubjectRe: Overcommitable memory??
    On 15 Mar 2000, Rask Ingemann Lambertsen wrote:
    >Den 14-Mar-00 18:32:49 Rik van Riel wrote:
    >> On 13 Mar 2000, Rask Ingemann Lambertsen wrote:

    >> Not really. Without overcommit you may still have random program
    >> crashes and lost work...
    >
    > Yes, really. Maybe I should have said "additional lost work" instead
    >of just "lost work". Without overcommit, program crashes will only
    >happen due software bugs or hardware problems.

    Not true. With no overcommit, you can still crash programs due to OOM
    situations.

    >Lost work will only happen due to user errors, software bugs or hardware
    >problems.

    Not true.

    >If you overcommit memory, you can lose the file you were editing in
    >emacs simply because someone sent you an email and the MTA needed a bit
    >of memory to deliver it to you. Some people, myself included, just don't
    >find that acceptable at all.

    Memory overcommit is here to stay. As I recall, Linux already used
    overcommit and COW when I started using it at version 0.99pl13. Get used
    to it, or find another OS...

    Dave

    David Whysong dwhysong@physics.ucsb.edu
    Astrophysics graduate student University of California, Santa Barbara
    My public PGP keys are on my web page - http://www.physics.ucsb.edu/~dwhysong
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    D-H PGP key 0x5DAB0F91 : BC33 0F36 FCCD E72C 441F 663A 72ED 7FB7 5DAB 0F91



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