还应该分析gc日志，以了解年老代空间回收的频率；最优的分代应用程序进行年老代空间回收操作的频率应该非常低。

You should also analyze GC logs to understand how frequently the tenured space gets collected; an optimal generational application will have very infrequent collection in the tenured space.

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切换到分代垃圾回收可以改善 IBM JVM 的性能，对于较大的堆而言，性能可以提升 5% 左右。

Switching to generational GC can improve performance on IBM JVMs, particularly for larger heap sizes, typically by around 5%.

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