EX200 VC high memory usage

Hi I just configured and started new EX2200 VC and I have a really high memory usage. Can you please help me

find out what's the problem

> show chassis routing-engine 
Routing Engine status:
  Slot 0:
    Current state                  Master
    Temperature                 39 degrees C / 102 degrees F
    CPU temperature             39 degrees C / 102 degrees F
    DRAM                      512 MB
    Memory utilization          84 percent
    5 sec CPU utilization:
      User                      21 percent
      Background                 0 percent
      Kernel                    25 percent
      Interrupt                  2 percent
      Idle                      53 percent
    1 min CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     0 percent
      Interrupt                  0 percent
      Idle                       0 percent
    5 min CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     0 percent
      Interrupt                  0 percent
      Idle                       0 percent
    15 min CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     0 percent
      Interrupt                  0 percent
      Idle                       0 percent
    Model                          EX2200-48T-4G
    Serial ID                      CU0213352806
    Start time                     2017-09-20 15:58:37 UTC
    Uptime                         8 days, 6 hours, 4 minutes, 21 seconds
    Last reboot reason             0x1:power cycle/failure 
    Load averages:                 1 minute   5 minute  15 minute
                                       0.28       0.34       0.37
Routing Engine status:
  Slot 1:
    Current state                  Backup
    Temperature                 35 degrees C / 95 degrees F
    CPU temperature             35 degrees C / 95 degrees F
    DRAM                      512 MB
    Memory utilization          54 percent
    5 sec CPU utilization:
      User                      10 percent
      Background                 0 percent
      Kernel                     8 percent
      Interrupt                  1 percent
      Idle                      80 percent
    Model                          EX2200-48T-4G
    Serial ID                      CU0214360644
    Start time                     2017-09-20 13:07:28 UTC
    Uptime                         8 days, 6 hours, 4 minutes, 27 seconds
    Last reboot reason             0x1:power cycle/failure 
    Load averages:                 1 minute   5 minute  15 minute
                                       0.23       0.19       0.16

thanks