设置适当的缓存大小和生存期值对于实现最佳性能非常关键。
Setting the correct cache sizes and lifetime values is critical in achieving optimal performance.
太频繁过期的缓存会导致不必要的性能下降；因此，优化缓存生存期值也是非常重要的。
A cache that expires too often can result in unnecessary performance degradation; therefore cache lifetime values are also important to tune.
非持久性属性只在GBean实例的生存期间保持它们的值，在实例消失后也消失。
Nonpersistent attributes retain their value during the life of the GBean instance and disappear when the instance goes away.
在整个应用程序生存期内，都保证了应用程序的utilization，其值要高于不需要进行太多的GC工作情况下utilization的最小值。
Application utilization is guaranteed over the application's lifetime, with potentially higher utilization than the minimum in situations where not much GC work is needed.
变量的生存期表示它可以存储值的时间周期。
The lifetime of a variable represents the period of time during which it can hold a value.
提供对会话状态值以及会话级别设置和生存期管理方法的访问。
Provides access to session-state values as well as session-level settings and lifetime management methods.
如果您在过程的生存期内多次进入该块，则每个块变量会保留它的前一个值。
If you enter the block more than once during the procedure, each block variable retains its previous value.
在生存期内变量的值可以更改，但变量总是存储某些值。
Its value can change over its lifetime, but it always holds some value.
在生存期内变量的值可以更改，但变量总是存储某些值。
Its value can change over its lifetime, but it always holds some value.
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