为内存密集型应用程序增加 JVM 最大堆大小

Increasing the JVM maximum heap size for memory intensive applications(为内存密集型应用程序增加 JVM 最大堆大小)

问题描述

我需要运行一个使用超过 2GB 的 Java 内存密集型应用程序，但我在增加堆最大大小时遇到​​了问题.到目前为止，我已经尝试了以下方法:

• 设置 -Xmx 参数，例如-Xmx3000 米.这种方法在创建 JVM 时失败.根据我的谷歌搜索，看起来 -Xmx 必须小于 2GB.

• 使用 -XX:+AggressiveHeap 选项.当我尝试这种方法时，我收到一个内存不足"错误，表明堆大小为 1273.4 MB，即使我的计算机有 8GB 内存.

是否有另一种方法可以尝试增加 JVM 的最大堆大小?以下是计算机规格的摘要:

• 操作系统:Windows 7(64 位)
• 处理器:Intel Core i7 (2.66 GHz)
• 内存:8 GB
• java-版本:

java 版本1.6.0_18"Java(TM) SE 运行时环境 (build 1.6.0_18-b07)Java HotSpot(TM) Client VM(build 16.0-b13，混合模式，共享)

从 甲骨文.

I need to run a Java memory intensive application that uses more than 2GB, but I am having problems to increase the heap maximum size. So far, I have tried the following approaches:

• Setting the -Xmx parameter, e.g. -Xmx3000m. This approaches fails at the creation of the JVM. From what I've googled, it looks like that -Xmx must be less than 2GB.

• Using the -XX:+AggressiveHeap option. When I try this approach I get an 'Not enough memory' error that tells that the heap size is 1273.4 MB, even though my computer has 8GB of memory.

Is there another approach that I can try to increase the maximum heap size of the JVM? Here's a summary of the computer specs:

• OS: Windows 7 (64 bit)
• Processor: Intel Core i7 (2.66 GHz)
• Memory: 8 GB
• java -version:

java version "1.6.0_18"
Java(TM) SE Runtime Environment (build 1.6.0_18-b07)
Java HotSpot(TM) Client VM (build 16.0-b13, mixed mode, sharing)

Get yourself a 64-bit JVM from Oracle.

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