Sohu Tech Products

Dec 27, 2023 · Operations

Why Does Elasticsearch Refresh Take 1‑5 Seconds? A Deep Dive into Index Settings and Soft Delete

This article records a systematic test of Elasticsearch refresh latency, revealing that update operations, a high proportion of deleted documents, and the soft‑delete setting significantly increase refresh time, while the large‑segment strategy and disabling soft delete can reduce latency without harming overall performance.