Runbook
Elasticsearch replica data synchronization delay
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Overview
This incident type refers to a delay in the synchronization of replica data in an Elasticsearch cluster. Elasticsearch is a search engine that allows for real-time search and analysis of data. In a cluster, data is distributed across multiple nodes to improve performance and ensure high availability. Replica data is a copy of the primary data that is stored on a different node in the cluster. The delay in synchronization of replica data can cause inconsistencies in the search results and affect the performance of the cluster. This issue can occur due to various reasons such as network latency, hardware failure, or software bugs.
Parameters
Debug
Check Elasticsearch cluster health status
List all Elasticsearch nodes in the cluster
Check the status of Elasticsearch indices
Check the number of replicas for each Elasticsearch index
Check the status of Elasticsearch replicas for a specific index
Check the status of Elasticsearch shards for a specific index
Check the disk usage of Elasticsearch nodes
Check the network latency between Elasticsearch nodes
Check the disk usage of Elasticsearch nodes
Check the CPU usage of Elasticsearch nodes
If the replica shard synchronization is stuck, try to force a sync or reset the replica shard.
Repair
Learn more
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