RFR: 8284900: Check InitialHeapSize and container memory limits before startup [v2]

[xpbob]

> 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

xpbob has updated the pull request incrementally with one additional commit since the last revision:

  use swap to limit

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8256/files
  - new: https://git.openjdk.java.net/jdk/pull/8256/files/6f9f8ad1..0f33960f

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8256&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8256&range=00-01

  Stats: 7 lines in 2 files changed: 2 ins; 1 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8256.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8256/head:pull/8256

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