Sar

Overview

Sar에 대한 기술 문서입니다.

Summary

• 무엇인가? - Sar
• 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: Sar에 대한 기술 정보 제공
• Scope: Sar의 개념, 사용법, 설정
• Non-goals: 다른 주제로의 확장

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Key Concepts

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

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Detailed Explanation

Monitoring server resources is a crucial part of identifying any bottlenecks and possible issues on your server. sar stands for “System Activity Reporter” and provides a wide range of metrics related to system usage, including CPU utilization, memory usage, disk I/O, network activity.

on Ubuntu, sar can be installed by following

#install sar
$ sudo apt-get install -y sysstat
# Enable data collecting
sed -i 's/false/true/g' /etc/default/sysstat
# Change the collection interval from every 10 minutes to every 2 minutes
sed -i 's/5-55\/10/*\/2/g' /etc/cron.d/sysstat
# Restart service
$ sudo systemctl start sysstat

sar can be run as system service as well,

1. sudo systemctl start sysstat
2. sudo systemctl enable sysstat
3. This will add the required cron jobs so that the system data is collected accordingly. The cron jobs will be added at cat /etc/cron.d/sysstat

Using systemd service, we can easily set sar up to run automatically on your system, store its collected stats in daily files. On Ubuntu, sar log files will be stored in /var/log/sysstat folder. To view all sar reports, $ sar -f /var/log/sysstat/sa07

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Best Practices

• 최신 버전 사용 권장
• 공식 문서 참고
• 테스트 환경에서 먼저 검증

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References

• Sar

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Related Pages

• Linux
• Server
• Hardware
• Network

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Knowledge Graph

Related

→ Linux → Linux Kernel Tuning → Vmstat → Ulimit → Linux file permission