Log in to the CSS management console.
Choose Clusters in the navigation pane. On the Clusters page, locate the target cluster and click Access Kibana in the Operation column.
Choose Dev Tools in the navigation pane on the left and run the following command to enable index monitoring:
```
PUT _cluster/settings
{
  "persistent": {
    "css.monitoring.index.enabled": "true"
  }
}
```

(Optional) To monitor a specific index, run the following command on the Dev Tools page of Kibana:

PUT _cluster/settings
{
  "persistent": {
    "css.monitoring.index.enabled": "true",
    "css.monitoring.index.interval": "30s",
    "css.monitoring.index.indices": ["index_name"],
    "css.monitoring.history.duration": "3d"
  }
}

**Table 1** Parameter description
Parameter	Data Type	Description
css.monitoring.index.enabled	Boolean	Whether to enable index monitoring. If this parameter is set to true, the monitoring will be enabled. Default value: false
css.monitoring.index.interval	Time	Interval for collecting index monitoring data. Minimum value: 1s Default value: 10s
css.monitoring.index.indices	String	Name of an index to be monitored. By default, all indexes are monitored. You can configure specific indexes or a type of indexes to monitor. Example: ""css.monitoring.index.indices": ["index_name"]" indicates only index_name is monitored. *"css.monitoring.index.indices": ["log_"] indicates that only indexes starting with log_ are monitored. "css.monitoring.index.indices": ["index1", "index2"] indicates that index1 and index2** are monitored. Default value: * (indicating that all indexes are monitored)
css.monitoring.history.duration	Time	Retention period of monitoring data storage. The default period is a week. Minimum value: 1d Default value: 7d

Indexes starting with monitoring-eye-css-* are regarded as monitoring indexes and will not be monitored.

Enabling Index Monitoring