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

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Purpose

이 문서가 존재하는 이유

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

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Key Concepts

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

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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 ---