Bug #9134: RUBY_HEAP_MIN_SLOTS does not work correctly in Ruby 2.0

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: 2.0.0

[sam.saffron (Sam Saffron)]

sam@ubuntu:~/Source$ rbenv shell ruby-head
sam@ubuntu:~/Source$ RUBY_HEAP_MIN_SLOTS=$(( 408*1000 )) ruby -e "puts GC.stat[:heap_length]"
1000

sam@ubuntu:~/Source$ rbenv shell 2.0.0-p247
sam@ubuntu:~/Source$ RUBY_HEAP_MIN_SLOTS=$(( 408*1000 )) ruby -e "puts GC.stat[:heap_length]"
1803

RUBY_HEAP_MIN_SLOTS is over committing heap space in 2.0 , this works perfectly fine in Ruby head.

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This only affects Ruby 2.0 not Ruby head. The over growth happens on first GC run, it grows the heaps to the correct size, but then quickly grows it again.

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Closed
• Backport deleted (1.9.3: UNKNOWN, 2.0.0: UNKNOWN)