Run the Java Heap Memory Observe Tool

The Java Heap Memory Observe tool is launched from the command line.

1. Start the emulator from the bin directory and open a sample application:

   Windows

   emulator.exe -Xdevice:DefaultCldcPhone1 -Xdebug -Xrunjdwp:transport=dt_socket,suspend=n,server=y,address=51307 -Xdescriptor:C:\Java_ME_platform_SDK_3.0\apps\Games\dist\Games.jad -Xdomain:maximum

   Mac OS

   ./emulator -Xdevice:DefaultCldcPhone1 -Xdebug -Xrunjdwp:transport=dt_socket,suspend=n,server=y,address=51307 -Xdescriptor:../apps/Games/dist/Games.jad -Xdomain:maximum

2. In a separate command window, start the memory profiler from the bin directory. The port number must match the address in the Xrunjdwp call:

   memory-profiler -host 127.0.0.1 -port 51307

   The profiler window opens.

3. Click the Connect button and wait for the profiler to attach to the process. It may take several seconds. After the connection, press Resume.
4. To take a snapshot of the heap, click the Pause button on the bottom right.

   The virtual machine is suspended while the profiler collects the snapshot information. The memory panel is then repopulated and the Resume button becomes active.

   See Heap Snapshot Elements.