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    SubjectRe: Out of memory?
    On Sun, 20 Aug 2000, Adam wrote:

    >
    > > Or perhaps a tunable or compile-time option to turn off overcommits?
    >
    > FYI, something aproximately like that already exists...
    >
    > sh-2.04$ cat /proc/sys/vm/overcommit_memory
    > 0

    Yep - at least, it LOOKS that way. In fact, it's a complete misnomer:
    with that value set to 0, you get "normal" Linux behaviour. Otherwise,
    processes receive demand-allocated memory: malloc() and friends will
    ALWAYS "succeed", then the memory is really allocated once you write to
    it.

    There are a few "tricks" to ensure malloc() & co only ever return "real"
    memory; the trouble is, this behaviour cripples Linux as a WWW server or
    similar, as well as wasting a LOT of swap space for no apparent gain.

    Resource limits are probably a better way to go to solve this sort of
    problem. That, and the various process-killing add-ons mentioned last time
    this topic cropped up.


    James.

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