7.18.3 -XX:CompressedClassSpaceSize

Description

-XX:CompressedClassSpaceSize specifies the maximum size of the Compressed Class Space.

If the functionality for the compressed object pointer is enabled, the Compressed Class Space is created in the Metaspace area.

In this case, the following information is deployed to each area.

• Compressed Class Space

  Class information referred to by the objects in the JavaHeap

• Metaspace area (excluding the Compressed Class Space)

  Method and other information excluding the above information

Prerequisite option

• -XX:+UseCompressedOops

Syntax

-XX:CompressedClassSpaceSize=size

Specifiable values

size

Type: Integer

Specify a natural number followed by one of the following units:

• "k" for kilo

• "m" for mega

• "g" for giga

You can specify an integer value from 1024 k to 3 g.

Note that the specification of this value is not case sensitive.

Default value

If the definition item is omitted:

For Windows x64 [server]

-XX:CompressedClassSpaceSize=1G

Legend

[server]: Indicates that Java HotSpot Server VM is used.

Notes

This option is not supported in Windows x86.