MarkSweepDeadRatio 参数讨论专区
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参数名称
MarkSweepDeadRatio
取值类型
unsigned int
参数说明
Percentage (0-100) of the old gen allowed as dead wood. Serial mark sweep treats this as both the minimum and maximum value. CMS uses this value only if it falls back to mark sweep. Par compact uses a variable scale based on the density of the generation and treats this as the maximum value when the heap is either completely full or completely empty. Par compact also has a smaller default value; see arguments.cpp.
用法及建议
- 使用该参数的正确姿势是-XX:MarkSweepDeadRatio=___
默认值
| 平台/版本 | JDK6 | JDK7 | JDK8 |
|---|---|---|---|
| Linux | 1 | 1 | 1 |
| MacOS | 5 | 1 | 1 |
| Windows | 5 | 1 | 1 |
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