测试本机JVM支持的最大内存

传说JVM是使用的最大内存一般Windows下1200-1500M左右，Linux下最大能到2600M。 可以设置的最大JVM内存和JVM版本以及操作系统版本有关，但是一直都不知道我机子的内存支持到底是多少，今天闲来无事，小测一把：

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D:\eclipse\workspace\download>java -Xmx1024M -version
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode)

D:\eclipse\workspace\download>java -Xmx2600M -version
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

D:\eclipse\workspace\download>java -Xmx1500M -version
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

D:\eclipse\workspace\download>java -Xmx1200M -version
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode)

D:\eclipse\workspace\download>java -Xmx1300M -version
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode)

D:\eclipse\workspace\download>java -Xmx1400M -version
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode)

D:\eclipse\workspace\download>java -Xmx1500M -version
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

D:\eclipse\workspace\download>java -Xmx1499M -version
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

D:\eclipse\workspace\download>java -Xmx1490M -version
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

D:\eclipse\workspace\download>java -Xmx1450M -version
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

D:\eclipse\workspace\download>java -Xmx1430M -version
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode)

D:\eclipse\workspace\download>java -Xmx1440M -version
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode)

D:\eclipse\workspace\download>java -Xmx1449M -version
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

D:\eclipse\workspace\download>java -Xmx1445M -version
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

D:\eclipse\workspace\download>java -Xmx1443M -version
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode)

D:\eclipse\workspace\download>java -Xmx1444M -version
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode)

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哈哈哈，最终结果java -Xmx1444M -version 感觉还是不错地！

 

评论

5 楼 56553655 2012-07-05  

最好这样：java -Xms3700M -Xmx3700M -version

4 楼 xiao888lin 2011-07-16  

你的头像看起来很像我们宿舍老四。。。

3 楼 xiaoqing20 2010-09-12  

我也是1440左右 呵呵

2 楼 cqllang 2010-04-19  

测试最大支持
java -Xmx1446M -version
1447就不行了，呵呵

1 楼 sundysea 2008-12-05  

我按你的方法测试通过，可是在tomcat 5.5里面设置就无法启动tomcat 5.5
[info] Error occurred during initialization of VM
[info] Could not reserve enough space for object heap
[395  javajni.c] [error] CreateJavaVM Failed
[1000 prunsrv.c] [error] Failed initializing java E:\Tomcat 5.5\bin\bootstrap.jar
[1269 prunsrv.c] [error] ServiceStart returned 2