This diagram consists of a row of six rectangles labeled as follows (from left to right):
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Eden
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Survivor
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Survivor
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Virtual
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Tenured
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Virtual
Groups of rectangles are labeled as follows:
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Total size: Rectangles 1 through 6
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Committed vs. Virtual: Committed consists of rectangles 1 through 3 and 5; virtual consists of rectangles 4 and 6
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Tenured to Young ratio: Tenured consists of rectangles 1-4; young consists of rectangles 5-6
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Eden to Survivor space ratio: Eden is rectangle 1; survivor space is rectangle 2