Issue #13783 has been reported by opti (Andreas Opti).

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Bug #13783: Memory allocation / GC does not free unused memory
https://bugs.ruby-lang.org/issues/13783

* Author: opti (Andreas Opti)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-linux]
* Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN
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100.times {x=[]; 1000000.times {|i| x.push [i,i*3]} }
100.times should use (more or less) the same memory as 3.times, 
also GC.start after x=[] doesn't help!
Problem: system begins swapping if doing that many times (using large data arrays running for longer times)




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