This subsection describes the prerequisites for using the Explicit Memory Management functionality. The availability of using the Explicit Memory Management functionality varies from server to server and command to command.

The following table describes whether the Explicit Memory Management functionality is supported. For the default settings, see 8.13.1 Common settings for using the Explicit Memory Management functionality (JavaVM option settings).

Table 8-2 Support for the Explicit Memory Management functionality

Server or command type	Supported
J2EE server	Y
Batch server	Y
SFO server	N
cjclstartap command	Y

Legend:

Y: The functionality is supported.

N: The functionality is not supported.

Whether the Explicit Memory Management functionality can be used for the objects related to an HTTP session and objects used for communication between a Web container and the redirector depends on the type of Web server that you use.

The following table describes Web server types and whether the Explicit Memory Management functionality can be used.

Table 8-3 Web server types and whether the Explicit Memory Management functionality can be used

Web server type	Objects related to HTTP session	Objects used for communication between Web container and redirector
Cosminexus HTTP Server	Y	Y
Microsoft IIS	Y	Y
In-process HTTP server	Y	--

Legend:

Y: The functionality can be used. The functionality is enabled by default.

--: The functionality cannot be used. Or, the functionality is not applicable.