Practical DevOps Architecture

Jul 31, 2025 · Operations

How to Diagnose and Fix Elasticsearch Throttling Allocation Issues

This guide explains how to use the Elasticsearch GET /_cluster/allocation/explain API to identify throttling deciders, interpret the underlying allocation limits, and adjust persistent or transient cluster routing settings—such as node_concurrent_recoveries and indices.recovery.max_bytes_per_sec—to resolve shard allocation bottlenecks.