High memory usage on CE6855

Hi,

my customer reported that his switch CE6855 is suffering high memory usage, the result of display memory is as below, please suggest which task occupies the most memory.

<SW-4F-B2-VM>display memory

Memory utilization statistics at 2020-01-13 04:13 233 ms

System Total Memory: 1881728 Kbytes   

Total Memory Used: 1707140 Kbytes   

Memory Using Percentage: 90%              

State: Non-overload     

Overload threshold:  95%, Overload clear threshold:  75%, Duration:      60s

----------------------------

ServiceName   MemUsage(KB)  

----------------------------

CMF                809742

FEA                 134218

FEC                  24131

PIM                  13213

AAA                   10103

IP STACK               7941

What does the service CMF present for?

Thanks for any suggestions.