UseAdaptiveSizePolicy和其他jvm选项 [英] UseAdaptiveSizePolicy and other jvm opts

问题描述

JVM选项-XX：+ UseAdaptiveSizePolicy被定义为热点人体工程学的一部分，可以使用吞吐量或暂停时间优先级来指定。

The JVM option -XX:+UseAdaptiveSizePolicy is defined as part of the hotspot ergonomics and can be specified with throughput or the pause time priority.

然而，我的问题是 - 是否正确提到其他jvm选项，如NewSize和SurvivorRatio一起提到它？这样做的确切影响是什么？

However, my question is - is it right to have the other jvm options like NewSize and SurvivorRatio mentioned along with it?. What exactly is the impact of doing that?

推荐答案

仅供参考， -XX：+ UseAdaptiveSizePolicy 默认启用在任何最新版本的Sun JVM中。

Just FYI, -XX:+UseAdaptiveSizePolicy is enabled by default in any recent version of the Sun JVM.

此外，我发现一篇文章：

避免麻烦： -XX：SurvivorRatio =
选项不兼容使用JVM
参数 -XX：+ UseAdaptiveSizePolicy 。
请根据
使用其中任何一种情况。

Avoid trouble: -XX:SurvivorRatio= option is incompatible with the JVM parameter -XX:+UseAdaptiveSizePolicy. Please use either one according to your situation.

我无法找到明确的答案 NewSize ，但它似乎设置了初始年轻代的大小，而不是永久性的，所以它与 UseAdaptiveSizePolicy不相互排斥。

I couldn't find a definitive answer for NewSize, but it appears it sets the initial young generation size, not permanent, so it's not mutually exclusive with UseAdaptiveSizePolicy.

但是，这里有一堆文章：

However, here's a bunch of articles:

• http://download.oracle.com/ javase / 1.5.0 / docs / guide / vm / gc-ergonomics.html


• http://www.oracle.com/technetwork/java/gc-tuning-5-138395.html


• http://developers.sun.com/mobility/midp/articles / garbagecollection2 /

• http://download.oracle.com/javase/1.5.0/docs/guide/vm/gc-ergonomics.html
• http://www.oracle.com/technetwork/java/gc-tuning-5-138395.html
• http://developers.sun.com/mobility/midp/articles/garbagecollection2/

但在大多数情况下，如果你重新调整 SurvivorRatio 将调整 NewSize 和 MaxNewSize 。

In most cases, however, if you're tuning SurvivorRatio will want to tune NewSize and MaxNewSize.

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