$ dpkg-query --show unity-2d-panel unity-2d-panel 5.2.0-0ubuntu1
top shows PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 3936 smoser 20 0 1989m 1.2g 20m S 32 31.3 229:41.50 firefox 2951 smoser 20 0 726m 285m 8232 S 1 7.3 30:36.61 unity-2d-panel
after not much more than 1 day up and general desktop usage, we've got 285m of RES memory for unity-2d-panel.
$ dpkg-query --show unity-2d-panel
unity-2d-panel 5.2.0-0ubuntu1
top shows
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3936 smoser 20 0 1989m 1.2g 20m S 32 31.3 229:41.50 firefox
2951 smoser 20 0 726m 285m 8232 S 1 7.3 30:36.61 unity-2d-panel
after not much more than 1 day up and general desktop usage, we've got 285m of RES memory for unity-2d-panel.