Description
This alert is triggered when the proportion of the disk space used in the directory where all OBServers in a zone are located (the /data/1 mount point of the OS) among the capacity of the operation directory where all OBServers in the zone are located exceeds the threshold.
Alert information
| Parameter | Value |
|---|---|
| Metric | ob_zone_disk_percent Note The value of the metric represents the data disk usage rate of a zone.When this value is greater than the threshold, this alert is triggered. The default threshold is 85%. |
| Source | select /*+ READ_CONSISTENCY(WEAK)*/ total_size, free_size from __all_virtual_disk_stat where svr_ip = @svr_ip and svr_port = rpc_port(); |
| Collected metric | total_size, free_size |
| Metric expression | 100 * (sum(total_size{metric_group="all_virtual_disk_stat",@LABELS}) by (@GBLABELS) - sum(free_size{metric_group="all_virtual_disk_stat",@LABELS}) by (@GBLABELS)) / sum(total_size{metric_group="all_virtual_disk_stat",@LABELS}) by (@GBLABELS) |
| Collection cycle | 60 seconds |
Alert rule
| Metric | Default threshold(unit:) | Duration | Detection cycle | Time before clearance |
|---|---|---|---|---|
| ob_zone_disk_percent | 75 | 0 seconds | 0 seconds | 5 minutes |
Alert information
| Trigger method | Alert level | Scope |
|---|---|---|
| Metric expression | Critical | Cluster |
Alert templates
Overview: ${alarm_target} ${alarm_name}
Details: Cluster: ${ob_cluster_name}, Host: ${host}, Alert: ${alarm_name}. The data disk usage is ${value}%, exceeding the threshold of ${alarm_threshold}%.
Overview example: ob_cluster=C1-1000:obzone=zone-2. The data disk usage of the zone of the OceanBase cluster exceeds the threshold.
Details example: Cluster: obcluster-1, Host: 192.168.0.1, Alert: The data disk usage of the zone of the OceanBase cluster exceeds the threshold. The data disk usage is 76.0%, exceeding the threshold of 75.0%.
Impact on the system
If the data disk space is insufficient, new data cannot be written to the data disk.
Possible cause
The application data size increases continuously.
