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      1. XX 的默认值:MaxDirectMemorySize

        Default for XX:MaxDirectMemorySize(XX 的默认值:MaxDirectMemorySize)
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                  本文介绍了XX 的默认值:MaxDirectMemorySize的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  XX:MaxDirectMemorySize 的默认值是多少?

                  What is the default value for XX:MaxDirectMemorySize?

                  推荐答案

                  来自 http://www.docjar.com/html/api/sun/misc/VM.java.html

                  我明白了:

                   163       // A user-settable upper limit on the maximum amount of allocatable direct
                   164       // buffer memory.  This value may be changed during VM initialization if
                   165       // "java" is launched with "-XX:MaxDirectMemorySize=<size>".
                   166       //
                   167       // The initial value of this field is arbitrary; during JRE initialization
                   168       // it will be reset to the value specified on the command line, if any,
                   169       // otherwise to Runtime.getRuntime.maxDirectMemory().
                   170       //
                   171       private static long directMemory = 64 * 1024 * 1024;
                  

                  所以它似乎默认为 64 兆.

                  so it appears to default to 64 megs.

                  这篇关于XX 的默认值:MaxDirectMemorySize的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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