更改jvm堆大小-jgrasp [英] changing jvm heap size - jgrasp

问题描述

我知道如何使用标志-Xmx在命令行上增加Java堆大小，我需要在jgrasp中运行程序，如何在该IDE中为我的程序增加堆大小?

I know how to increase java heap size on command line using flag -Xmx, I need to run my program in jgrasp, how do I increase the heap size for my program in that IDE?

System.out.println("---->" + Runtime.getRuntime().maxMemory());

System.out.println("---->"+Runtime.getRuntime().maxMemory());

打印----> 66650112

prints ---->66650112

添加标志-Xmx256m

on adding flag -Xmx256m

堆大小仍显示相同的数字

the heap size still print the same number

推荐答案

即使您通过-Xmx256m，也并不意味着JVM会立即分配该数量. -Xmx指定 max 堆. JVM将等待分配更多的堆，直到它认为合适为止.如果要指定 min 堆并确保立即达到限制，请使用-Xms256m.

Even when you pass -Xmx256m, it doesn't mean that the JVM is going to allocate that amount right away. -Xmx specifies the max heap. The JVM will wait to allocate more heap up until that limit as it sees fit. If you want to specify the min heap and make sure you reach the limit right away, use -Xms256m.

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