CRS125 nand write rate

What is the expected write rate to the built-in nand disk on the CRS125 ?

On my system, which serves as a switch, with no configuration changes, ROS 6.14, I see:

                   uptime: 2d10h6m1s
  write-sect-since-reboot: 5549



                   uptime: 3d4m23s
  write-sect-since-reboot: 6939

In other words, it is ~80 writes per hour. It is somewhat consistent with the fact that a set of munin plugins performs API access once in 5 minutes, doing 4 logins per access. On the other hand, logging seems to happen to memory:

[kostik@MikroTik] > system logging print
Flags: X - disabled, I - invalid, * - default 
 #    TOPICS                             ACTION                         PREFIX    
 0  * info                               memory                                        
 1  * error                              memory                                                  
 2  * warning                           memory                                                   
 3  * critical                          echo

So, any idea is the write stream too high, and what to do to avoid writes on login ?