Chapter 9: Managing Clusters
In the Elasticsearch ecosystem, it's important to monitor nodes and clusters in order to manage and improve their performance and state. Several issues can arise at the cluster level, such as the following:
- Node overheads: Some nodes can have too many shards allocated and become a bottleneck for the entire cluster.
- Node shutdown: This can happen due to a number of reasons, for example, full disks, hardware failures, and power problems.
- Shard relocation problems or corruptions: Some shards can't get an online status.
- Shards that are too large: If a shard is too big, then the index performance decreases due to the merging of massive Lucene segments.
- Empty indices and shards: These waste memory and resources; however, ...
Get Elasticsearch 8.x Cookbook - Fifth Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
