A load test revealed Redis latency soaring to 1.2 seconds, and a systematic investigation traced the root cause to mis‑configured JedisPool parameters, leading to excessive connection wait times and churn, which were fixed by aligning pool settings and enabling proper eviction, dramatically improving latency.
This article investigates why a Spring Boot application using JedisPool experiences high connection‑acquisition latency, analyzes the Evictor logic and mis‑configured pool parameters, and presents a custom configuration solution that stabilizes the pool and eliminates repeated connection creation and destruction.
During a March 2023 load test the team discovered Redis request latency soaring to 1.2 seconds, traced the issue to mis‑configured JedisPool parameters and excessive connection churn, and resolved it by adjusting pool settings, dramatically improving P50, P90 and P99 response times.
A detailed investigation reveals that excessive Redis latency was caused by misconfigured JedisPool parameters, leading to long connection wait times and frequent connection churn, and shows how adjusting pool settings dramatically improved response times and overall system performance.
