ALM-12192 Host Load Exceeds the Threshold

Alarm Description

The system checks the average load every 30 seconds and compares the actual average load with the threshold. This alarm is generated when the average load exceeds the threshold for multiple consecutive times (10 by default).

This alarm is cleared when Trigger Count is 1 and the average load is less than or equal to the threshold. This alarm is cleared when Trigger Count is greater than 1 and the average load is less than or equal to 90% of the threshold.

Alarm Attributes

Alarm Parameters

Impact on the System

• Latency: Service processes may run slowly and there is a latency.
• Service failure: Service processing may be slow, time out, or fail. As a result, jobs may fail to run.

Possible Causes

• The alarm threshold or alarm trigger count is improperly configured.
• The host cannot meet service requirements. The average load reaches the upper limit. Alternatively, requirements surged during peak hours, and the average load reaches the upper limit in a short period.

Handling Procedure

Check whether the alarm threshold or alarm trigger count is properly configured.

1. Modify the alarm threshold and alarm trigger count based on the actual CPU usage.
   1. To change the threshold, log in to FusionInsight Manager, choose O&M > Alarm > Thresholds, click the name of the desired cluster, and choose Host > Host Status > Average Host Load Information.
   2. Click the edit button next to Trigger Count to set it a proper value based on the actual service usage.
      

      Trigger Count indicates how many consecutive times the threshold is reached when the alarm is triggered.

   3. Click Modify in the Operation column of the row that contains the rule and change the alarm threshold.

2. Wait 2 minutes and check whether the alarm is automatically cleared.
   • If yes, no further action is required.
   • If no, go to 3.

Check whether the average load reaches the upper limit.

3. On FusionInsight Manager, choose O&M > Alarm > Alarms. In the alarm list, expand the alarm details and click the name of the host for which the alarm is generated in Location area.
4. On the overview page of the host, observe the real-time data of average host load for about 5 minutes. If the average load exceeds the threshold for multiple times, contact the MRS cluster administrator to improve the host specification.

   If Average Host Load Information chart is not displayed, click the drop-down arrow on the right, select Customize, select the desired item, and click OK.

5. Check whether it was the peak hour. If this alarm was generated during peak hours, expand the node capacity or contact the MRS cluster administrator to improve the host specification.
6. Check whether the alarm is cleared.
   • If yes, no further action is required.
   • If no, go to 7.

Collect fault information.

7. On FusionInsight Manager, choose O&M. In the navigation pane on the left, choose Log > Download.
8. Expand the Service drop-down list, select NodeAgent for the target cluster, and click OK.
9. Click the edit icon in the upper right corner, and set Start Date and End Date for log collection to 10 minutes ahead of and after the alarm generation time, respectively. Then, click Download.
10. Contact O&M engineers and provide the collected logs.

Alarm Clearance

This alarm is automatically cleared after the fault is rectified.

Related Information

None.