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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"JVM垃圾回收一节中动态年龄计算表述有误","articleBody":"正确的表述应该是：“Hotspot遍历所有对象时，按照年龄从小到大对其所占用的大小进行累积，当累积的某个年龄大小超过了survivor区的一半时，取这个年龄和MaxTenuringThreshold中更小的一个值，作为新的晋升年龄阈值”。\r\n\r\n**动态年龄计算的代码如下**\r\n```\r\nuint ageTable::compute_tenuring_threshold(size_t survivor_capacity) {\r\n\t//survivor_capacity是survivor空间的大小\r\n  size_t desired_survivor_size = (size_t)((((double) survivor_capacity)*TargetSurvivorRatio)/100);\r\n  size_t total = 0;\r\n  uint age = 1;\r\n  while (age \u003c table_size) {\r\n    total += sizes[age];//sizes数组是每个年龄段对象大小\r\n    if (total \u003e desired_survivor_size) break;\r\n    age++;\r\n  }\r\n  uint result = age \u003c MaxTenuringThreshold ? age : MaxTenuringThreshold;\r\n\t...\r\n}\r\n```","author":{"url":"https://github.com/onelogistics","@type":"Person","name":"onelogistics"},"datePublished":"2019-11-18T07:11:15.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":11},"url":"https://github.com/552/JavaGuide/issues/552"}