永久增加java堆大小？

Is there a way that I can set the default heap size for the jvm on my own computer? I want to set it to 1g, because I'm always running custom programs that always hit the overage point in the default jvm size.

有没有办法可以在我自己的计算机上设置jvm的默认堆大小？我想将它设置为1g，因为我总是运行自定义程序，总是在默认的jvm大小中达到过剩点。

I just dont want to have to remember to type -XmX1g everytime I run my java app from the command line...

每次我从命令行运行我的java应用程序时，我都不想记得输入-XmX1g ...

There has to be an admin way to do this right?

必须有一个管理方式来做到这一点吗？

4 个解决方案

#1

Apparently, _JAVA_OPTIONS works on Linux, too:

显然，_JAVA_OPTIONS也适用于Linux：

$ export _JAVA_OPTIONS="-Xmx1g"
$ java -jar jconsole.jar &
Picked up _JAVA_OPTIONS: -Xmx1g

#2

For Windows users, you can add a system environment variable named _JAVA_OPTIONS, and set the heap size values there. The JVM should be able to grab the virtual machine options from _JAVA_OPTIONS.

对于Windows用户，可以添加名为_JAVA_OPTIONS的系统环境变量，并在其中设置堆大小值。 JVM应该能够从_JAVA_OPTIONS中获取虚拟机选项。

#3

This worked for me:

这对我有用：

export _JAVA_OPTIONS="-Xmx1g"

It's important that you have no spaces because for me it did not work. I would suggest just copying and pasting. Then I ran:

重要的是你没有空格，因为对我来说它不起作用。我建议只是复制和粘贴。然后我跑了：

java -XshowSettings:vm

and it will tell you:

它会告诉你：

Picked up _JAVA_OPTIONS: -Xmx1g

拿起_JAVA_OPTIONS：-Xmx1g

#4

what platform are you running?..
if its unix, maybe adding

你在运行什么平台？如果它是unix，可能会添加

alias java='java -XmX1g'

to .bashrc (or similar) work

到.bashrc（或类似的）工作

#1