Performance Optimization

Overview

Performance Optimization에 대한 기술 문서입니다.

Summary

• 무엇인가? - Performance Optimization
• 왜 필요한가? - HPC 및 서버 환경에서 필수 개념
• 언제 사용하는가? - 서버 구성, 성능 튜닝, 문제 해결 시

Purpose

이 문서가 존재하는 이유

• Goal: Performance Optimization에 대한 기술 정보 제공
• Scope: Performance Optimization의 개념, 사용법, 설정
• Non-goals: 다른 주제로의 확장

Key Concepts

Concept	Description	Related
Performance Optimization	HPC/서버 환경에서 중요한 기술 개념	Linux, Server

Detailed Explanation

Linux is known for its flexibility and ability to be customized, which allows system administrators to adjust its behavior to achieve top performance through fine-tune its kernel parameters. in general, Real-time tuning for benchmark can be done using sysctl -w command and permanent change by editing /etc/sysctl.conf and sysctl -p HPCMATE DLS system provides pre-configured kernel level optimization and UCM (Universial Cluster Manager) provides real-time kernel level optimization via real-time system monitoring. TCP/IP stack parameters in Linux offers powerful possibilities for improved network performance.

Key parameter	Description	Recommendation
ipv4.tcp_fin_timeout	This controls how long a connection stays in the “FIN-WAIT-2” state after it’s gracefully closed. Lowering this value (default: 60 seconds) can free up resources faster. particularly useful for servers handling lots of short connections	Recommended Value: 20-30 seconds
ipv4.tcp_tw_reuse	This allows the reuse of sockets in “TIME-WAIT” state. On busy servers, enabling this parameter helps manage high loads more efficiently by enabling quicker recycling of connections	ipv4.tcp_tw_reuse: Recommended Value: 1 (Enable)
ipv4.tcp_max_syn_backlog	This value controls the maximum number of connection requests that the server can queue up while waiting for full three-way handshake completion. Increasing this value helps prevent dropping new connections when your server is under heavy load	Recommended Values: Start with doubling the default and adjust based on your server’s traffic load Best Practices 최신 버전 사용 권장 공식 문서 참고 테스트 환경에서 먼저 검증 References Performance Optimization Related Pages Linux Server Hardware Network Knowledge Graph Related → Linux → Server → Hardware → Network