Hi, I’m a considerate developer.

I believe being considerate means writing clean, readable code,
building predictable and testable systems,
and delivering reliable, trustworthy services that users can depend on.

I’m constantly learning and growing to become better at this,
and this blog is where I share my journey as a learning developer.

Latest Post

Pod 리소스를 줄였더니 GC가 바뀌었다 - JDK 21 ergonomics를 OTel과 Prometheus로 확인하기

Lowering a Pod's CPU and memory limits can silently switch the JVM from G1 to Serial GC. See the switch in OpenTelemetry and Prometheus metrics, and what it does to GC time and response latency.

JDK 21에서 Pod의 CPU, 메모리 limit을 줄이면 JVM ergonomics에 의해 G1GC가 Serial GC로 바뀔 수 있다. 실제 Kubernetes Pod에서 GC가 바뀌는 순간을 OpenTelemetry와 Prometheus 지표로 확인하고, GC가 바뀌었을 때 GC 시간과 응답 시간이 어떻게 달라지는지 살펴본다.

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Recently Updated

Timeout 설정 헷갈리지 않기: Tomcat, WebFlux, HTTP Client, HikariCP 기준 정리

Updated: 2026-09-23

connection/socket/read/write timeout, max lifetime, keepalive - what each setting actually controls on Tomcat, HTTP clients, and HikariCP, and how to configure them without mixing up the layers.

이름은 비슷한데 하는 일이 다른 타임아웃/keepalive 설정들을 Tomcat, WebFlux(Reactor Netty), HTTP 클라이언트(Feign, RestTemplate, WebClient), HikariCP 기준으로 나눠서 정리한다.

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