High deleted-docs ratio
Elastic Cloud Hosted lets you manage and configure one or more deployments of the versioned Elastic Stack, hosted on Elastic Cloud. Availability This functionality is generally available and ready for production usage. Elastic Cloud on Kubernetes extends Kubernetes orchestration capabilities to allow you to deploy and manage components of the Elastic Stack. Availability This functionality is generally available and ready for production usage. This documentation corresponds to the latest patch available for each minor version. If you're not using the latest patch, check the release notes for changes. Elastic Cloud Enterprise is a self-managed orchestration platform for deploying and managing the Elastic Stack at scale. Availability This functionality is generally available and ready for production usage. This documentation corresponds to the latest patch available for each minor version. If you're not using the latest patch, check the release notes for changes. Self-managed deployments are Elastic Stack deployments managed without the assistance of an orchestrator. Availability This functionality is generally available and ready for production usage. This documentation corresponds to the latest patch available for each minor version. If you're not using the latest patch, check the release notes for changes.
ECH
Generally available
ECK
Generally available
ECE
Generally available
Self-managed
Generally available
Some indices retain a large share of documents marked deleted but not yet merged away. Those tombstones still use disk and add work during searches.
For a complete list of insights, refer to AutoOps insights.
| Field | Value |
|---|---|
| Component | Elasticsearch |
| Severity | Low |
| Scope | Index |
| Domains | disk-storage, index-management |
The following is an example of what you might see when this insight is triggered. Real insights use live data and links from your deployment or cluster.
Some indices retain a high ratio of deleted documents that still occupy disk.
Highest ratio: logs-prod-000045 (500 GB, 42,000,000 total docs, 85% deleted).
AutoOps shows different recommendations depending on how their conditions match your deployment or cluster.
Force merge deleted documents
Condition: Always shown for this insight.
Run a force merge with only_expunge_deletes=true on logs-prod-000045, logs-prod-000046 to reclaim disk used by deleted documents. Use the action below.
POST logs-archive-000001/_forcemerge?only_expunge_deletes=trueRequires the manage cluster privilege. Requires Elasticsearch 8.0.0 or later. This action changes cluster or index configuration.
Reindex indices
Condition: Always shown for this insight.
Reindex indices with many deleted documents into new indices. After reindex completes, delete the old indices to reclaim disk space.
When you delete or update documents, Elasticsearch marks old versions as deleted rather than removing them immediately. Over time, a high deleted-docs ratio means much of the index size is tombstones. That wastes disk and can slow searches because more segments must be filtered.