Help Center > > User Guide> FusionInsight Manager Operation Guide> Alarm Reference (Applicable to MRS 3.x)> ALM-12027 Host PID Usage Exceeds the Threshold

ALM-12027 Host PID Usage Exceeds the Threshold

Updated at: Mar 25, 2021 GMT+08:00

Description

The system checks the PID usage every 30 seconds and compares the actual PID usage with the default PID usage threshold. This alarm is generated when the system detects that the PID usage exceeds the threshold.

When the Trigger Count is 1, this alarm is cleared when the PID usage is less than or equal to the threshold. When the Trigger Count is greater than 1, this alarm is cleared when the PID usage is less than or equal to 90% of the threshold.

Attribute

Alarm ID

Alarm Severity

Auto Clear

12027

Major

Yes

Parameters

Name

Meaning

Source

Specifies the cluster or system for which the alarm is generated.

ServiceName

Specifies the service for which the alarm is generated.

RoleName

Specifies the role for which the alarm is generated.

HostName

Specifies the host for which the alarm is generated.

Trigger Condition

Specifies the threshold triggering the alarm. If the current indicator value exceeds this threshold, the alarm is generated.

Impact on the System

No PID is available for new processes and service processes are unavailable.

Possible Causes

Too many processes are running on the node. You need to increase the value of pid_max.

Procedure

Increase the value of pid_max.

  1. In the alarm list on FusionInsight Manager, click in the row where the alarm is located to view the alarm host address in the alarm details.
  2. Log in to the host where the alarm is generated as user root.
  3. Run the cat /proc/sys/kernel/pid_maxcommand to check the value of pid_max.
  4. If the PID usage exceeds the threshold, run the command echo new value > /proc/sys/kernel/pid_max to enlarge the value of pid_max.

    Example: echo 65536 > /proc/sys/kernel/pid_max

  5. Wait for 5 minutes, and check whether the alarm is cleared.

    • If yes, no further action is required.
    • If no, go to 6.

Collect fault information.

  1. On the FusionInsight Manager home page of the active cluster, choose O&M > Log > Download.
  2. Select all services from the Service and click OK.
  3. Click in the upper right corner, and set Start Date and End Date for log collection to 30 minutes ahead of and after the alarm generation time, respectively. Then, click Download.
  4. Contact the O&M personnel and send the collected log information.

Alarm Clearing

After the fault is rectified, the system automatically clears this alarm.

Related Information

None

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