disassembled screen images and software GUIs after memory full.
 

When memory gets full by some software, then the screen images and GUIs get disassembled. like this.
As the memory allocation of Software should be separated by kernel I think this can be solved by allocation more memory for the Desktop manager.
How can I solve this?

nice

nice - run a program with modified scheduling priority


Run COMMAND with an adjusted niceness, which affects process scheduling. With no
COMMAND, print the current niceness. Niceness values range from -20 (most favorable
to the process) to 19 (least favorable to the process).

-n, --adjustment=N
add integer N to the niceness (default 10)