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Home/ Questions/Q 682139
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Editorial Team
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Editorial Team
Asked: May 14, 20262026-05-14T01:33:44+00:00 2026-05-14T01:33:44+00:00

that is, could a malloc() asking for 5 mb in the C part fail

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that is, could a malloc() asking for 5 mb in the C part fail due to:

  • jvm was run with -Xmx32m and jvm heap is already 30 mb
  • something to do with jvm being 32 bits in a 64 bits windows
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  1. Editorial Team
    Editorial Team
    2026-05-14T01:33:45+00:00Added an answer on May 14, 2026 at 1:33 am

    The answer to the the first bullet is “no” – Xmx refers to the Java heap and any native allocations are completely separate.

    The answer to the second bullet is “yes” – native allocations are subject to the general process allocation restrictions inherent in the O/S and/or hardware.

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