Configuration Guide      System Management Display Configuration 
The memory resources are severely insufficient. One 
route protocol will auto-exit and release the memory if 
the lower watermark has been reached. For the details, 
see the memory-lack exit-policy command.   
The memory resources are insufficient. The route 
protocol will be in OVERFLOW state if the low watermark 
has been reached. In the overflow state, the routers do 
not learn new routes any more. The commands are not 
allowed to be executed when the memory lacks. 
A plenty of memory resources. Each route protocol 
attempts to restore the state from OVERFLOW to 
normal. 
3. System total memory, current free memory and used rate.