<![CDATA[Containerized Spring Boot microservices frequently encounter performance limitations arising from inefficient JVM memory allocation, blocking concurrency models, and suboptimal resource configuration. This paper presents a comprehensive analysis of optimization strategies for Java‑based microservices running on Spring Boot and Java 17, emphasizing adaptive memory management, thread‑pool tuning, and reactive resource handling. The study examines dynamic heap‑sizing techniques that align JVM memory parameters with container constraints to reduce garbage‑collection frequency and prevent allocation failures. Off‑heap memory approaches, including Netty and native allocation, are evaluated for their ability to lower heap pressure in high‑throughput I/O workloads. Concurrency optimization is addressed through queuing‑theory‑based sizing of fixed and cached thread pools to minimize contention and improve throughput in traditional blocking execution models. The analysis extends to data‑access layers, where reactive database connectivity (R2DBC) and dynamic connection‑pool tuning algorithms are applied to reduce thread waiting time and tail latency. Additional improvements include JPA query and pooling optimizations, Tomcat connector configuration, Spring Boot tuning practices, and Docker image refinements that reduce startup time and memory footprint. The combined evaluation provides a unified framework for enhancing responsiveness, scalability, and resource efficiency in cloud‑native Spring Boot microservices.]]>
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