Help Center > > User Guide> MRS Manager Operation Guide (Applicable to 2.x and Earlier Versions)> Alarm Reference (Applicable to Versions Earlier Than MRS 3.x)> ALM-12018 Memory Usage Exceeds the Threshold

ALM-12018 Memory Usage Exceeds the Threshold

Updated at: Aug 17, 2021 GMT+08:00


The system checks the memory usage every 30 seconds and compares the actual memory usage with the threshold. The memory usage has a default threshold. This alarm is generated when the detected memory usage exceeds the threshold.

This alarm is cleared when the host memory usage is less than or equal to 90% of the threshold.


Alarm ID

Alarm Severity

Auto Clear








Specifies the service for which the alarm is generated.


Specifies the role for which the alarm is generated.


Specifies the host for which the alarm is generated.

Trigger Condition

Generates an alarm when the actual indicator value exceeds the specified threshold.

Impact on the System

Processes respond slowly or do not work.

Possible Causes

Memory configuration cannot meet service requirements. The memory usage reaches the upper threshold.


  1. Expand the system.

    1. Go to the MRS cluster details page. In the alarm list on the alarm management tab page, click the row that contains the alarm. In the alarm details, view the host address of the alarm.
    2. Log in to the node for which the alarm is generated.
    3. Run free -m | grep Mem\: | awk '{printf("%s,", ($3-$6-$7) * 100 / $2)}' to check the system memory usage.
    4. If the memory usage exceeds the threshold, expand the memory capacity.
    5. Wait 5 minutes and check whether the alarm is cleared.
      • If yes, no further action is required.
      • If no, go to 2.

  2. Collect fault information.

    1. On MRS Manager, choose System > Export Log.
    2. Contact the O&M personnel and send the collected logs.



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