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javajitjvm-hotspot

Which Java HotSpot JIT compiler is running?

I would like to know if my no VM argument invocation of HotSpot Java is running with -client, -server, or tiered compilation options. When I supply no VM arguments, which one is chosen by default? Is there a way to output diagnostics about which JIT compiler is running?

Solution

  • Assuming this is Hotspot:

    -XshowSettings:vm

    For example, on my Windows box I get output of:

    VM settings:
    Max. Heap Size (Estimated): 1.77G
    Ergonomics Machine Class: client
    Using VM: Java HotSpot(TM) 64-Bit Server VM