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Home/ Questions/Q 758439
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Editorial Team
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Editorial Team
Asked: May 14, 20262026-05-14T15:28:46+00:00 2026-05-14T15:28:46+00:00

Is there a utility (for Windows) that uses up memory so I can create

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Is there a utility (for Windows) that uses up memory so I can create a JVM “could not reserve enough space for object heap” error?

I want to use up this memory in a process outside of the JVM.

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  1. Editorial Team
    Editorial Team
    2026-05-14T15:28:47+00:00Added an answer on May 14, 2026 at 3:28 pm

    Just use the -Xms flag

    java -Xms3g org.foo.Main
    

    The above will try to create an initial heap size of 3 GB, just adjust the number so it is larger than the total memory of your system (physical & virtual)

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