Taking more memory than provided

[saikiranravupalli]

Language server is taking almost 1GB data, even if I use "-Xmx512m"

const args = [
    "-Declipse.application=org.eclipse.jdt.ls.core.id1",
    "-Dosgi.bundles.defaultStartLevel=4",
    "-Declipse.product=org.eclipse.jdt.ls.core.product",
    "-Dlog.level=ALL",
    "-noverify",
    "-XX:MinHeapFreeRatio=5",
    "-XX:MaxHeapFreeRatio=10",
    "-XX:GCTimeRatio=4",
    "-XX:AdaptiveSizePolicyWeight=90",
    "-Dsun.zip.disableMemoryMapping=true",
    "-Xmx512m",
    "-Xms100m",
    "-jar",
    `${jdtPath}/jdt-language-server-1.9.0-202203031534/plugins/org.eclipse.equinox.launcher_1.6.400.v20210924-0641.jar`,
    "-configuration",
    `${jdtPath}/jdt-language-server-1.9.0-202203031534/config_linux`,
    "-data",
    `${dataPath}`,
    "--add-modules=ALL-SYSTEM",
    "--add-opens java.base/java.util=ALL-UNNAMED",
    "--add-opens java.base/java.lang=ALL-UNNAMED",
  ];

[rgrunber]

How are you viewing the memory footprint of the application ? Xmx will limit heap memory usage, but a Java application can use more for non-heap memory usage. Tools like VisualVM might do a good job showing whether the heap size limits are being respected by JDT-LS.

[fbricon]

To learn more about that subject: https://plumbr.io/blog/memory-leaks/why-does-my-java-process-consume-more-memory-than-xmx