Why Smaller DB Connection Pools Boost Performance: Lessons from HikariCP Tests

This article explains how reducing the size of a database connection pool can dramatically lower request latency and improve throughput, using HikariCP performance experiments, a simple sizing formula, and practical guidelines for configuring pools on modern hardware.

Database Connection PoolHikariCPSQL latency

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Why Smaller DB Connection Pools Boost Performance: Lessons from HikariCP Tests

Java Backend Technology

Jun 21, 2019 · Databases

Why Bigger Database Connection Pools Hurt Performance and How to Size Them Right

This article debunks the myth that larger database connection pools always improve performance, explains how CPU, disk, and network I/O affect optimal pool size, presents real‑world test results, and provides a practical formula for calculating the right number of connections.

CPUDatabase Connection PoolDisk I/O

0 likes · 10 min read

Why Bigger Database Connection Pools Hurt Performance and How to Size Them Right