Memory Usage of dentry Exceeds the Threshold

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The cluster OS is Red Hat 6.4, CentOS 6.4, or later versions. After the cluster is installed, the slabtop command is used to view the memory usage on the active NameNode and active ResourceManager. It is found that the dentry memory usage keeps increasing and "ALM-12018 Memory Usage Exceeds the Threshold" is finally reported.
Possible Causes:The version of the nbss-util and nss-softokn RPM packages in the OS is too early and related environment variables are not imported.Contact the OS vendor to upgrade the nbss-util and nss-softokn RPM packaged to a specified version or later and import environment variables as user omm.

Other related questions:
In FusionInsight,how to resolve the alarm ALM-12018 Memory Usage Exceeds the Threshold?
Expand the system. 1.In the alarm list on FusionInsight Manager, locate the row that contains the alarm, and view the alarm host address in the alarm details. 2.Use PuTTY to log in to the host where the alarm is generated as user root. 3.Run the command 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, perform memory capacity expansion. For details, see the FusionInsight HD Capacity Adjustment Guide. 5.Wait for 5 minutes, check whether the alarm is cleared. If yes, no further action is required. If no, go to Step 6.

In FusionInsight,What is the impact on system of ALM-12018 Memory Usage Exceeds the Threshold
Service processes respond slowly or become unavailable.

In FusionInsight,What is the possible cause for ALM-12018 Memory Usage Exceeds the Threshold
1.Memory configuration cannot meet service requirements. The 2.memory usage reaches the upper limit.

In FusionInsight,What time does ALM-12018 Memory Usage Exceeds the Threshold
The system checks the memory usage of the system 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 value of the memory usage exceeds the threshold.

how to deal with Host Memory Usage Exceeds the Threshold alarm on FusionCompute V1R5C00 version
The system monitors the host memory usage every 60 seconds. This alarm is generated when the system detects that the host memory usage is greater than or equal to the specified alarm threshold for three consecutive times. This alarm is cleared when the host memory usage is less than the minor alarm threshold Check the alarm thresholds for the host memory usage. On the FusionCompute, choose System > Service Configuration, expand Alarm in the Configuration Item area on the left, and select Alarm Threshold. On the Alarm Threshold page, expand Memory usage in the Entity column and check whether the alarm thresholds for the host memory usage are too low. If yes, go to Step 2. If no, go to Step 4. Adjust the alarm thresholds and check whether the alarm is cleared. For details about alarm threshold adjustment, see Configuring Alarm Thresholds. After 3 or 4 minutes, switch to the Alarm page and check whether the alarm is cleared. If yes, go to Step 6. If no, go to Step 4. Migrate VMs from this host to other hosts. Migrate VMs from this host to other hosts. For details, see Migrating a VM. If no host is to be migrated, go toStep 7 After 3 or 4 minutes, switch to the Alarm page and check whether the alarm is cleared. If yes, go to Step 6. If no, go to Step 7. On the Alarm page, click the alarm object in the Alarm Object column, view Memory usage in the Monitoring Information pane in the lower right part of the Summary page, and check whether it is less than the minor alarm threshold.

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