ALM-27006 Disk Space Usage of the Data Directory Exceeds the Threshold

Description

The system checks the disk space usage of the data directory on the active DBServer node every 30 seconds and compares the disk usage with the threshold. The alarm is generated when the disk space usage exceeds the threshold for five consecutive times (the default value). The number of consecutive times is configurable. The disk space usage threshold of the data directory is set to 80% by default, which is configurable as well.

The value of hit number is configurable. When the value is set to 1 and the disk space usage is lower than or equal to the threshold, the alarm is cleared. When the value is greater than 1 and the disk space usage is lower than 90% of the threshold, the alarm is cleared.

Attribute

Alarm ID	Alarm Severity	Auto Clear
27006	Major	Yes

Parameters

Name	Meaning
ClusterName	Specifies the cluster 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.
PartitionName	Specifies the disk partition where the alarm is generated.
Trigger Condition	Specifies the threshold triggering the alarm. If the actual indicator value exceeds this threshold, the alarm is generated.

Impact on the System

Service processes become unavailable.
When the disk space usage of the data directory exceeds 90%, the database reports the "Database Enters the Read-Only Mode" alarm and enters the read-only mode, which may cause service data loss.

Possible Causes

The alarm threshold is improperly configured.
The data volume of the database is too large or the disk configuration cannot meet service requirements, causing excessive disk usage.

Procedure

Check whether the threshold is set properly.

On FusionInsight Manager, choose O&M > Alarm > Thresholds > Name of the desired cluster > DBService > Database > Disk Space Usage of the Data Directory to check whether the alarm threshold is proper (the default value 80% is a proper value).
- If yes, go to 3.
- If no, go to 2.
Change the alarm threshold based on the actual service situation.
Choose Cluster > Name of the desired cluster > Services > DBService. On the Dashboard page, view the Disk Space Usage of the Data Directory chart and check whether the disk space usage of the data directory is lower than the threshold.
- If yes, go to 4.
- If no, go to 5.
Figure 1 Disk Space Usage of the Data Directory
Wait 2 minutes and check whether the alarm is automatically cleared.
- If yes, no further action is required.
- If no, go to 5.
Check whether large files are incorrectly written into the disk.
Log in to the active DBService node as user omm.
Run the following commands to view the files whose size exceeds 500 MB in the data directory and check whether there are large files incorrectly written into the directory:

source $DBSERVER_HOME/.dbservice_profile

find "$DBSERVICE_DATA_DIR"/../ -type f -size +500M
- If yes, go to 7.
- If no, go to 8.
Handle the large files based on the actual scenario and check whether the alarm is cleared 2 minutes later.
- If yes, no further action is required.
- If no, go to 8.
Collect fault information.
On FusionInsight Manager, choose O&M > Log > Download.
Expand the Service drop-down list, and select DBService for the target cluster.
Specify the host for collecting logs by setting the Host parameter which is optional. By default, all hosts are selected.
Click 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.
Contact the O&M personnel and send the collected logs.