@@ -212,7 +212,7 @@ The following Elasticsearch settings are available:
| `Password` | The password of your Elasticsearch instance. |
| `Number of Elasticsearch shards` | Elasticsearch indices are split into multiple shards for performance reasons. In general, you should use at least 5 shards, and indices with tens of millions of documents need to have more shards ([see below](#guidance-on-choosing-optimal-cluster-configuration)). Changes to this value do not take effect until the index is recreated. You can read more about tradeoffs in the [Elasticsearch documentation](https://www.elastic.co/guide/en/elasticsearch/reference/current/scalability.html). |
| `Number of Elasticsearch replicas` | Each Elasticsearch shard can have a number of replicas. These are a complete copy of the shard, and can provide increased query performance or resilience against hardware failure. Increasing this value increases total disk space required by the index. |
| `Limit the number of namespaces and projects that can be indexed` | Enabling this allows you to select namespaces and projects to index. All other namespaces and projects use database search instead. If you enable this option but do not select any namespaces or projects, none are indexed. [Read more below](#limit-the-number-of-namespaces-and-projects-that-can-be-indexed).
| `Limit the number of namespaces and projects that can be indexed` | Enabling this allows you to select namespaces and projects to index. All other namespaces and projects use database search instead. If you enable this option but do not select any namespaces or projects, none are indexed. [Read more below](#limit-the-number-of-namespaces-and-projects-that-can-be-indexed).|
| `Using AWS hosted Elasticsearch with IAM credentials` | Sign your Elasticsearch requests using [AWS IAM authorization](https://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_access-keys.html), [AWS EC2 Instance Profile Credentials](https://docs.aws.amazon.com/codedeploy/latest/userguide/getting-started-create-iam-instance-profile.html#getting-started-create-iam-instance-profile-cli), or [AWS ECS Tasks Credentials](https://docs.aws.amazon.com/AmazonECS/latest/userguide/task-iam-roles.html). Please refer to [Identity and Access Management in Amazon OpenSearch Service](https://docs.aws.amazon.com/opensearch-service/latest/developerguide/ac.html) for details of AWS hosted OpenSearch domain access policy configuration. |
| `AWS Region` | The AWS region in which your OpenSearch Service is located. |
If you are a self-managed customer who uses GitLab 15.0 with Advanced Search, you will experience performance degradation.
To clean up the migration, upgrade to 15.1 or later.
For other Advanced Search migrations stuck in pending, see [how to retry a halted migration](../integration/advanced_search/elasticsearch.md#retry-a-halted-migration).
### What do you do for the error `Elasticsearch version not compatible`
