Management
- Alerting indexes
- Alerting settings

Management

Alerting indexes

The alerting feature creates several indexes and one alias. The Security plugin demo script configures them as system indexes for an extra layer of protection. Don’t delete these indexes or modify their contents without using the alerting APIs.

Index	Purpose
`.opendistro-alerting-alerts`	Stores ongoing alerts.
`.opendistro-alerting-alert-history-<date>`	Stores a history of completed alerts.
`.opendistro-alerting-config`	Stores monitors, triggers, and destinations. Take a snapshot of this index to back up your alerting configuration.
`.opendistro-alerting-alert-history-write` (alias)	Provides a consistent URI for the `.opendistro-alerting-alert-history-<date>` index.

All alerting indexes are hidden by default. For a summary, make the following request:

GET _cat/indices?expand_wildcards=open,hidden

Alerting settings

We don’t recommend changing these settings; the defaults should work well for most use cases.

All settings are available using the OpenSearch _cluster/settings API. None require a restart, and all can be marked persistent or transient. To learn more about static and dynamic settings, see Configuring OpenSearch.

Setting	Default	Description
`plugins.scheduled_jobs.enabled`	true	Whether the alerting plugin is enabled or not. If disabled, all monitors immediately stop running.
`plugins.alerting.index_timeout`	60s	The timeout for creating monitors and destinations using the REST APIs.
`plugins.alerting.request_timeout`	10s	The timeout for miscellaneous requests from the plugin.
`plugins.alerting.action_throttle_max_value`	24h	The maximum amount of time you can set for action throttling. By default, this value displays as 1440 minutes in OpenSearch Dashboards.
`plugins.alerting.input_timeout`	30s	How long the monitor can take to issue the search request.
`plugins.alerting.bulk_timeout`	120s	How long the monitor can write alerts to the alert index.
`plugins.alerting.alert_backoff_count`	3	The number of retries for writing alerts before the operation fails.
`plugins.alerting.alert_backoff_millis`	50ms	The amount of time to wait between retries—increases exponentially after each failed retry.
`plugins.alerting.alert_history_rollover_period`	12h	How frequently to check whether the `.opendistro-alerting-alert-history-write` alias should roll over to a new history index and whether the Alerting plugin should delete any history indexes.
`plugins.alerting.move_alerts_backoff_millis`	250	The amount of time to wait between retries—increases exponentially after each failed retry.
`plugins.alerting.move_alerts_backoff_count`	3	The number of retries for moving alerts to a deleted state after their monitor or trigger has been deleted.
`plugins.alerting.monitor.max_monitors`	1000	The maximum number of monitors users can create.
`plugins.alerting.alert_history_max_age`	30d	The oldest document to store in the `.opendistro-alert-history-<date>` index before creating a new index. If the number of alerts in this time period does not exceed `alert_history_max_docs`, alerting creates one history index per period (e.g. one index every 30 days).
`plugins.alerting.alert_history_max_docs`	1000	The maximum number of alerts to store in the `.opendistro-alert-history-<date>` index before creating a new index.
`plugins.alerting.alert_history_enabled`	true	Whether to create `.opendistro-alerting-alert-history-<date>` indexes.
`plugins.alerting.alert_history_retention_period`	60d	The amount of time to store history indexes before automatically deleting them.
`plugins.alerting.destination.allow_list`	[“chime”, “slack”, “custom_webhook”, “email”, “test_action”]	The list of allowed destinations. If you don’t want to allow users to a certain type of destination, you can remove it from this list, but we recommend leaving this setting as-is.
`plugins.alerting.filter_by_backend_roles`	“false”	Restricts access to monitors by backend role. See Alerting security.
`plugins.alerting.cross_cluster_monitoring_enabled`	“false”	Toggles whether cluster metrics monitors support running against remote clusters.
`plugins.scheduled_jobs.sweeper.period`	5m	The alerting feature uses its “job sweeper” component to periodically check for new or updated jobs. This setting is the rate at which the sweeper checks to see if any jobs (monitors) have changed and need to be rescheduled.
`plugins.scheduled_jobs.sweeper.page_size`	100	The page size for the sweeper. You shouldn’t need to change this value.
`plugins.scheduled_jobs.sweeper.backoff_millis`	50ms	The amount of time the sweeper waits between retries—increases exponentially after each failed retry.
`plugins.scheduled_jobs.sweeper.retry_count`	3	The total number of times the sweeper should retry before throwing an error.
`plugins.scheduled_jobs.request_timeout`	10s	The timeout for the request that sweeps shards for jobs.
`plugins.alerting.comments_enabled`	`false`	Enables or disables comments for the Alerting plugin.
`plugins.alerting.comments_history_max_docs`	1000	The maximum number of comments to store in the `.opensearch-alerting-comments-history-<date>` index before creating a new index.
`plugins.alerting.comments_history_max_age`	30d	The oldest document to store in an `.opensearch-alerting-comments-history-<date>` index before creating a new one. If the number of comments in the specified time period does not exceed `comments_history_max_docs`, then 1 index is created per period (for example, 1 every 30 days).
`plugins.alerting.comments_history_rollover_period`	12h	How often to determine whether the `.opensearch-alerting-comments-history-write` alias should roll over to a new index and delete old comment history indexes.
`plugins.alerting.comments_history_retention_period`	60d	The amount of time to keep comment history indexes before automatic deletion.
`plugins.alerting.max_comment_character_length`	2000	The maximum character length of a comment.
`plugins.alerting.max_comments_per_alert`	500	The maximum number of comments that can be posted on an alert.
`plugins.alerting.max_comments_per_notification`	3	The maximum number of comments per alert to include in the `ctx` Mustache template variable for alert notifications.