RFR: 8284900: Check InitialHeapSize and container memory limits before startup

[Jie Fu]

On Fri, 15 Apr 2022 03:27:21 GMT, xpbob <duke at openjdk.java.net> wrote:

> Check InitialHeapSize and container memory limits before startup
> 
> 
> Operating System Metrics:
>     Provider: cgroupv1
>     Effective CPU Count: 8
>     CPU Period: 100000us
>     CPU Quota: -1
>     CPU Shares: -1
>     List of Processors, 8 total: 
>     0 1 2 3 4 5 6 7 
>     List of Effective Processors: N/A
>     List of Memory Nodes, 1 total: 
>     0 
>     List of Available Memory Nodes: N/A
>     Memory Limit: 50.00M
>     Memory Soft Limit: Unlimited
>     Memory & Swap Limit: Unlimited
>     Maximum Processes Limit: 4194305
> 
> command:-Xms50m -XshowSettings:system -version 
> 
> When the memory limit is exceeded, the startup fails
> 
> 
> Error occurred during initialization of VM
> Initial heap size set to a larger value than the os or container memory

src/hotspot/share/gc/shared/gcArguments.cpp line 130:

> 128:   }
> 129: 
> 130:   if (FLAG_IS_CMDLINE(InitialHeapSize) && InitialHeapSize >= os::physical_memory()) {

What will happen if the swap space is unlimited?

    Memory Soft Limit: Unlimited
    Memory & Swap Limit: Unlimited

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PR: https://git.openjdk.java.net/jdk/pull/8256