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Linux快速检测CPU、内存、I/O瓶颈

  • 2026-01-31 12:17:35
Linux快速检测CPU、内存、I/O瓶颈

Linux快速检测CPU、内存、I/O瓶颈

# 安装 sysstat iotop yum install sysstat iotop# 负载三命令uptimedmesg | tailvmstat 2 # vim ~/.bashrcalias health='uptime; echo "---"; dmesg | tail -5; echo "---"; vmstat 2 5'# CPU瓶颈定位# 查看线程级CPU使用# 查看每个CPU核心的使用情况# 查看进程的CPU使用详情top -Hmpstat -P ALL 1pidstat -u 1 # 内存瓶颈定位# 看内存概况# 详细内存信息# 内核对象缓存free -hcat /proc/meminfoslabtop# 查看内存使用趋势# 查看swap活动sar -r 1sar -W 1# I/O瓶颈定位# 磁盘I/O统计# 实时I/O监控iostat -x 1iotop
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  1. 请求信息 : 2026-02-09 02:34:12 HTTP/2.0 GET : https://f.mffb.com.cn/a/460010.html
  2. 运行时间 : 0.299650s [ 吞吐率：3.34req/s ] 内存消耗：4,835.79kb 文件加载：140
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=6e008d7ffde377e2ae587d2aa23473b2
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  1. CONNECT:[ UseTime:0.001077s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001385s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000692s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.006374s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001410s ]
  6. SELECT * FROM `set` [ RunTime:0.000618s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001443s ]
  8. SELECT * FROM `article` WHERE `id` = 460010 LIMIT 1 [ RunTime:0.004987s ]
  9. UPDATE `article` SET `lasttime` = 1770575652 WHERE `id` = 460010 [ RunTime:0.021860s ]
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