Configuring the Java Virtual Manager (JVM)

本文详细介绍了如何在Windows、Unix/Linux系统以及命令行环境中,通过环境变量JAVA_OPTS来设置Java堆内存大小(Xms和Xmx),包括操作步骤和实例。

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Windows

To set Java heap size options with Sun Java (JAVA_OPTS environment variable) on Windows

  1. On the taskabar, click Start, and then point to Settings, Control Panel, and System.

  2. In the System Properties dialog box Advanced tab, click Environment Variables.

  3. In the Environment Variables dialog box, under System variables, click New.

  4. In the New System Variable dialog box, enter:

    1. Variable name: JAVA_OPTS.

    2. Variable value -Xms256m -Xmx512m

  5. Click OK.

  6. Verify that the Environment Variables dialog box displays the following system variable name value pair:

    JAVA_OPTS="-Xms256m -Xmx512m "

  7. Click OK, OK to close the System Properties dialog box.

Unix/Linux

To set Java heap size options with Sun Java (JAVA_OPTS environment variable) on Unix/Linux

  1. Start a terminal session.

  2. At the command prompt type:

    export set JAVA_OPTS=”-Xms256m -Xmx512m”

  3. Close the terminal session.

Command Line Settings

The maximum heap size can be set as a parameter in the XbrlCalculate.cmd:

set JAVA_OPTS=-Xms768m -Xmx1g -XX:PermSize=128m -XX:MaxPermSize=256m

java %JAVA_OPTS% -cp "%CLASSPATH%" ubmatrix.xbrl.tools.xbrlCalculate.src.XbrlCalculate %*

or in the XbrlCalculate.sh:

JAVA_OPTS="-Xms768m -Xmx1g -XX:PermSize=128m -XX:MaxPermSize=256m"

java ${JAVA_OPTS} -cp "${CLASSPATH}" ubmatrix.xbrl.tools.xbrlCalculate.src.XbrlCalculate $@

 

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