Increase Java Memory in Windows 7

Running Java applications in computers takes some memory during the process which is known as Java memory (Java heap). Frequently, it is necessary to increase that heap to prevent throttling the performance of the application. This is how to for Windows 7.

Steps

1. Go to Control Panel. Click on "Start" button. Then click on "Control Panel."
2. Select Programs. In the left side of Control Panel click on "Programs." Please click on the "Programs" written with green color, not the "Uninstall a program," which is in blue color.
3. Go to Java settings. In the next dialog click on "Java," usually at the bottom of the other Programs; "Java Control Panel" dialog pop-up opens.
4. Select "Java" tab. Inside the Java tab, click on "View" button. It opens the "Java Runtime Environment Settings"
5. Change amount of heap. In the "Runtime Parameters" column change the value, or if it is blank decide for the new value, of the Java memory.
6. Modify the parameter. To modify the parameter, double click in the "Runtime Parameters" column and,
   • type -Xms512m - that assigns 512MB memory for the Java.
   • type -Xms1024m - that assigns 1GB memory for the Java.
   • type -Xms2048m - that assigns 2GB memory for the Java.
   • type -Xms3072m - that assigns 3GB memory for the Java, and so on.
   • Please note, it begins with a minus sign and ends to an m.
   • Also note, there is no blank space between characters.
7. Close the dialogue box. Click on "OK" button on the "Java Runtime Environment Settings" to close it.
8. Close Java dialogue box. "Apply" button in the "Java Control Panel" has been enabled now. You should click on "Apply" to finalise the new Java memory. Then click on the "OK" button.
9. Close the Windows 7 Control Panel.

Tips

• If Java cannot find enough memory it dispatches an "exception" message to the Windows as, "Exception in thread "main" java.lang.OutOfMemoryError: Java heap space."
• This method also can be used for Windows 8.
• This is a 'temporary' amount of memory which is available to Java applications when you are running them. It does not "steal" or permanently deduct from the memory of computer. It is only a guarantee for Java Virtual Machine.
• Restarting of the computer is not necessary after modifying the Java memory.
• The value you select depends on how much memory your computer has and how much memory all running processes consume.
• This method with some modification also can be used for Windows Xp

Related Articles

• Adjust Virtual Memory
• Dramatically Speed up Windows XP
• Increase Laptop Memory
• Test Network and Internet Latency (Lag) in Microsoft Windows
• Change Java Runtime

See also

• Remove Programs (Windows 7)
• Change Java Runtime
• Find and Update Drivers for Windows 7
• Do Common Tasks Faster in Windows 7
• How do I add an item to the Right Click menu?
• Change Character Repeat and Cursor Blink Settings in Windows 7
• Install Windows 7
• Add an "Open With Notepad As Administrator" Shortcut to the Context Menu in Windows 7 and Windows Vista
• Create a New Jbutton on Jframe Using Java
• Become a Java Programmer

Read more ...

What links here

• Dramatically Speed up Windows XP
• Adjust Virtual Memory
• Increase Laptop Memory
• Change Java Runtime