# 实战的主要内容
# 监控系统部署：部署系统监控工具
# 性能调优实施：实施CPU、内存、磁盘I/O、网络调优
# 问题排查与解决：排查系统问题并解决
# 效果验证：验证调优效果
# 总结与建议：总结经验并提出建议

# 监控系统部署

# 1. 安装监控工具
[root@localhost ~]# yum install -y htop iotop nethogs sysstat dstat glances
Updating Subscription Management repositories.
Last metadata expiration check: 0:00:01 ago on Fri Apr 3 10:00:00 2026.
Dependencies resolved.
================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
htop x86_64 3.0.5-9.el9 appstream 157 k
iotop x86_64 0.6-15.el9 appstream 54 k
nethogs x86_64 0.8.5-15.el9 appstream 48 k
sysstat x86_64 11.7.3-9.el9 appstream 383 k
dstat x86_64 0.7.4-5.el9 appstream 73 k
glances x86_64 3.1.7-3.el9 appstream 416 k

Transaction Summary
================================================================================
Install 6 Packages

Total download size: 1.1 M
Installed size: 3.8 M
Downloading Packages:
[1/6] htop-3.0.5-9.el9.x86_64.rpm 1.1 MB/s | 157 kB 00:00
[2/6] iotop-0.6-15.el9.x86_64.rpm 1.1 MB/s | 54 kB 00:00
[3/6] nethogs-0.8.5-15.el9.x86_64.rpm 1.1 MB/s | 48 kB 00:00
[4/6] sysstat-11.7.3-9.el9.x86_64.rpm 1.1 MB/s | 383 kB 00:00
[5/6] dstat-0.7.4-5.el9.x86_64.rpm 1.1 MB/s | 73 kB 00:00
[6/6] glances-3.1.7-3.el9.x86_64.rpm 1.1 MB/s | 416 kB 00:00
——————————————————————————–
Total 6.6 MB/s | 1.1 MB 00:00
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : htop-3.0.5-9.el9.x86_64 1/6
Installing : iotop-0.6-15.el9.x86_64 2/6
Installing : nethogs-0.8.5-15.el9.x86_64 3/6
Installing : sysstat-11.7.3-9.el9.x86_64 4/6
Installing : dstat-0.7.4-5.el9.x86_64 5/6
Installing : glances-3.1.7-3.el9.x86_64 6/6
Running scriptlet: glances-3.1.7-3.el9.x86_64 6/6
Verifying : htop-3.0.5-9.el9.x86_64 1/6
Verifying : iotop-0.6-15.el9.x86_64 2/6
Verifying : nethogs-0.8.5-15.el9.x86_64 3/6
Verifying : sysstat-11.7.3-9.el9.x86_64 4/6
Verifying : dstat-0.7.4-5.el9.x86_64 5/6
Verifying : glances-3.1.7-3.el9.x86_64 6/6

Installed:
htop-3.0.5-9.el9.x86_64 iotop-0.6-15.el9.x86_64 nethogs-0.8.5-15.el9.x86_64
sysstat-11.7.3-9.el9.x86_64 dstat-0.7.4-5.el9.x86_64 glances-3.1.7-3.el9.x86_64

Complete!

# 2. 配置监控服务
[root@localhost ~]# systemctl enable –now sysstat
Created symlink /etc/systemd/system/multi-user.target.wants/sysstat.service → /usr/lib/systemd/system/sysstat.service.

# 3. 查看监控服务状态
[root@localhost ~]# systemctl status sysstat
● sysstat.service – LSB: System performance monitoring tools
Loaded: loaded (/usr/lib/systemd/system/sysstat.service; enabled; preset: disabled)
Active: active (exited) since Fri 2026-04-03 10:00:00 CST; 5s ago
Process: 12345 ExecStart=/usr/libexec/sysstat-collect (code=exited, status=0/SUCCESS)
Main PID: 12345 (code=exited, status=0/SUCCESS)

Apr 03 10:00:00 localhost systemd[1]: Starting LSB: System performance monitoring tools…
Apr 03 10:00:00 localhost sysstat-collect[12345]: SA: System activity data collector started.
Apr 03 10:00:00 localhost systemd[1]: Started LSB: System performance monitoring tools.

# 4. 创建监控脚本
[root@localhost ~]# cat > /usr/local/bin/monitor.sh << 'EOF' #!/bin/bash # script.sh # from:www.itpux.com.qq113257174.wx:itpux-com # web: http://www.fgedu.net.cn # 监控脚本 LOG_FILE="/var/log/monitor.log" REPORT_FILE="/var/log/monitor-report.txt" # 记录日志函数 log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> $LOG_FILE
}

# 监控CPU
monitor_cpu() {
log “Monitoring CPU…”

echo “=== CPU Monitor ===” >> $REPORT_FILE
echo “” >> $REPORT_FILE

# CPU使用率
CPU_USAGE=$(top -bn1 | grep “Cpu(s)” | awk ‘{print $2}’ | sed ‘s/us,//’)
echo “CPU Usage: ${CPU_USAGE}%” >> $REPORT_FILE

# 负载平均值
LOAD_AVG=$(uptime | awk -F’load average:’ ‘{print $2}’)
echo “Load Average:${LOAD_AVG}” >> $REPORT_FILE

# 上下文切换
CONTEXT_SWITCHES=$(vmstat 1 2 | tail -1 | awk ‘{print $12}’)
echo “Context Switches: ${CONTEXT_SWITCHES}” >> $REPORT_FILE

echo “” >> $REPORT_FILE
}

# 监控内存
monitor_memory() {
log “Monitoring memory…”

echo “=== Memory Monitor ===” >> $REPORT_FILE
echo “” >> $REPORT_FILE

# 内存使用率
MEMORY_USAGE=$(free | grep Mem | awk ‘{printf(“%.0f”), $3/$2 * 100.0}’)
echo “Memory Usage: ${MEMORY_USAGE}%” >> $REPORT_FILE

# 交换使用率
SWAP_USAGE=$(free | grep Swap | awk ‘{printf(“%.0f”), $3/$2 * 100.0}’)
echo “Swap Usage: ${SWAP_USAGE}%” >> $REPORT_FILE

# 缓存使用
CACHE_USAGE=$(free | grep Mem | awk ‘{print $6}’)
echo “Cache Usage: ${CACHE_USAGE} KB” >> $REPORT_FILE

echo “” >> $REPORT_FILE
}

# 监控磁盘I/O
monitor_disk() {
log “Monitoring disk I/O…”

echo “=== Disk I/O Monitor ===” >> $REPORT_FILE
echo “” >> $REPORT_FILE

# 磁盘利用率
DISK_UTIL=$(iostat -x 1 2 | grep sda | tail -1 | awk ‘{print $14}’)
echo “Disk Utilization: ${DISK_UTIL}%” >> $REPORT_FILE

# I/O等待时间
IO_WAIT=$(iostat -x 1 2 | grep sda | tail -1 | awk ‘{print $10}’)
echo “I/O Wait: ${IO_WAIT} ms” >> $REPORT_FILE

# 队列长度
QUEUE_LENGTH=$(iostat -x 1 2 | grep sda | tail -1 | awk ‘{print $11}’)
echo “Queue Length: ${QUEUE_LENGTH}” >> $REPORT_FILE

echo “” >> $REPORT_FILE
}

# 监控网络
monitor_network() {
log “Monitoring network…”

echo “=== Network Monitor ===” >> $REPORT_FILE
echo “” >> $REPORT_FILE

# 网络接口利用率
NET_UTIL=$(sar -n DEV 1 2 | grep eth0 | tail -1 | awk ‘{print $8}’)
echo “Network Utilization: ${NET_UTIL}%” >> $REPORT_FILE

# 网络流量
NET_RX=$(sar -n DEV 1 2 | grep eth0 | tail -1 | awk ‘{print $5}’)
NET_TX=$(sar -n DEV 1 2 | grep eth0 | tail -1 | awk ‘{print $6}’)
echo “Network RX: ${NET_RX} KB/s” >> $REPORT_FILE
echo “Network TX: ${NET_TX} KB/s” >> $REPORT_FILE

echo “” >> $REPORT_FILE
}

# 主函数
main() {
log “Starting monitoring…”

# 清空报告文件
> $REPORT_FILE

# 监控各项
monitor_cpu
monitor_memory
monitor_disk
monitor_network

log “Monitoring completed. Report saved to $REPORT_FILE”
}

# 执行主函数
main
EOF

# 5. 设置脚本执行权限
[root@localhost ~]# chmod +x /usr/local/bin/monitor.sh

# 6. 创建日志文件
[root@localhost ~]# touch /var/log/monitor.log
[root@localhost ~]# chmod 644 /var/log/monitor.log

# 7. 配置定时任务
[root@localhost ~]# echo “0 */1 * * * root /usr/local/bin/monitor.sh” > /etc/cron.d/monitor

# 8. 重启cron服务
[root@localhost ~]# systemctl restart crond

# 9. 测试监控脚本
[root@localhost ~]# /usr/local/bin/monitor.sh

# 10. 查看报告
[root@localhost ~]# cat /var/log/monitor-report.txt
=== CPU Monitor ===

CPU Usage: 2.5%
Load Average: 0.10, 0.15, 0.12
Context Switches: 20

=== Memory Monitor ===

Memory Usage: 50%
Swap Usage: 0%
Cache Usage: 2048000 KB

=== Disk I/O Monitor ===

Disk Utilization: 0.00%
I/O Wait: 0.00 ms
Queue Length: 0.00

=== Network Monitor ===

Network Utilization: 0.10%
Network RX: 10.00 KB/s
Network TX: 5.00 KB/s

# 性能调优实施

# 1. CPU调优
[root@localhost ~]# cat > /usr/local/bin/cpu-tuning.sh << 'EOF' #!/bin/bash # script.sh # from:www.itpux.com.qq113257174.wx:itpux-com # web: http://www.fgedu.net.cn # CPU调优脚本 LOG_FILE="/var/log/cpu-tuning.log" # 记录日志函数 log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> $LOG_FILE
}

# 设置CPU调度器
set_cpu_governor() {
log “Setting CPU governor to performance…”
echo performance > /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
log “CPU governor set to performance.”
}

# 配置CPU参数
configure_cpu_params() {
log “Configuring CPU parameters…”

cat > /etc/sysctl.d/99-cpu-tuning.conf << 'EOF' kernel.sched_min_granularity_ns = 1000000 kernel.sched_wakeup_granularity_ns = 2000000 kernel.sched_tunable_scaling = 1 kernel.sched_latency_ns = 20000000 kernel.sched_time_avg_ms = 1000 kernel.sched_nr_migrate = 32 kernel.sched_migration_cost_ns = 500000 EOF sysctl -p /etc/sysctl.d/99-cpu-tuning.conf log "CPU parameters configured." } # 主函数 main() { log "Starting CPU tuning..." # 设置CPU调度器 set_cpu_governor # 配置CPU参数 configure_cpu_params log "CPU tuning completed." } # 执行主函数 main EOF # 2. 设置脚本执行权限 [root@localhost ~]# chmod +x /usr/local/bin/cpu-tuning.sh # 3. 执行CPU调优 [root@localhost ~]# /usr/local/bin/cpu-tuning.sh # 4. 内存调优 [root@localhost ~]# cat > /usr/local/bin/memory-tuning.sh << 'EOF' #!/bin/bash # 内存调优脚本 LOG_FILE="/var/log/memory-tuning.log" # 记录日志函数 log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> $LOG_FILE
}

# 配置内存参数
configure_memory_params() {
log “Configuring memory parameters…”

cat > /etc/sysctl.d/99-memory-tuning.conf << 'EOF' vm.swappiness = 10 vm.dirty_ratio = 15 vm.dirty_background_ratio = 5 vm.vfs_cache_pressure = 75 vm.min_free_kbytes = 131072 vm.overcommit_memory = 1 vm.overcommit_ratio = 100 vm.dirty_expire_centisecs = 3000 vm.dirty_writeback_centisecs = 500 EOF sysctl -p /etc/sysctl.d/99-memory-tuning.conf log "Memory parameters configured." } # 主函数 main() { log "Starting memory tuning..." # 配置内存参数 configure_memory_params log "Memory tuning completed." } # 执行主函数 main EOF # 5. 设置脚本执行权限 [root@localhost ~]# chmod +x /usr/local/bin/memory-tuning.sh # 6. 执行内存调优 [root@localhost ~]# /usr/local/bin/memory-tuning.sh # 7. 磁盘I/O调优 [root@localhost ~]# cat > /usr/local/bin/disk-tuning.sh << 'EOF' #!/bin/bash # 磁盘I/O调优脚本 LOG_FILE="/var/log/disk-tuning.log" # 记录日志函数 log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> $LOG_FILE
}

# 设置I/O调度器
set_io_scheduler() {
log “Setting I/O scheduler to bfq…”
echo bfq > /sys/block/sda/queue/scheduler
log “I/O scheduler set to bfq.”
}

# 配置磁盘预读
set_readahead() {
log “Setting disk readahead to 1024…”
blockdev –setra 1024 /dev/sda
log “Disk readahead set to 1024.”
}

# 主函数
main() {
log “Starting disk tuning…”

# 设置I/O调度器
set_io_scheduler

# 设置磁盘预读
set_readahead

log “Disk tuning completed.”
}

# 执行主函数
main
EOF

# 8. 设置脚本执行权限
[root@localhost ~]# chmod +x /usr/local/bin/disk-tuning.sh

# 9. 执行磁盘I/O调优
[root@localhost ~]# /usr/local/bin/disk-tuning.sh

# 10. 网络调优
[root@localhost ~]# cat > /usr/local/bin/network-tuning.sh << 'EOF' #!/bin/bash # 网络调优脚本 LOG_FILE="/var/log/network-tuning.log" # 记录日志函数 log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> $LOG_FILE
}

# 配置网络参数
configure_network_params() {
log “Configuring network parameters…”

cat > /etc/sysctl.d/99-network-tuning.conf << 'EOF' net.core.somaxconn = 65535 net.core.netdev_max_backlog = 5000 net.core.rmem_default = 262144 net.core.rmem_max = 16777216 net.core.wmem_default = 262144 net.core.wmem_max = 16777216 EOF sysctl -p /etc/sysctl.d/99-network-tuning.conf log "Network parameters configured." } # 配置TCP参数 configure_tcp_params() { log "Configuring TCP parameters..." cat > /etc/sysctl.d/99-tcp-tuning.conf << 'EOF' net.ipv4.tcp_fin_timeout = 30 net.ipv4.tcp_keepalive_time = 600 net.ipv4.tcp_keepalive_probes = 5 net.ipv4.tcp_keepalive_intvl = 30 net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_tw_recycle = 0 net.ipv4.tcp_max_syn_backlog = 8192 net.ipv4.tcp_max_tw_buckets = 6000 net.ipv4.tcp_rmem = 4096 87380 16777216 net.ipv4.tcp_wmem = 4096 65536 16777216 net.ipv4.tcp_mtu_probing = 1 net.ipv4.tcp_congestion_control = bbr EOF sysctl -p /etc/sysctl.d/99-tcp-tuning.conf log "TCP parameters configured." } # 主函数 main() { log "Starting network tuning..." # 配置网络参数 configure_network_params # 配置TCP参数 configure_tcp_params log "Network tuning completed." } # 执行主函数 main EOF # 11. 设置脚本执行权限 [root@localhost ~]# chmod +x /usr/local/bin/network-tuning.sh # 12. 执行网络调优 [root@localhost ~]# /usr/local/bin/network-tuning.sh

# 问题排查与解决

# 1. 创建问题排查脚本
[root@localhost ~]# cat > /usr/local/bin/troubleshoot.sh << 'EOF' #!/bin/bash # script.sh # from:www.itpux.com.qq113257174.wx:itpux-com # web: http://www.fgedu.net.cn # 问题排查脚本 LOG_FILE="/var/log/troubleshoot.log" REPORT_FILE="/var/log/troubleshoot-report.txt" # 记录日志函数 log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> $LOG_FILE
}

# 检查系统启动
check_system_boot() {
log “Checking system boot…”

echo “=== System Boot Check ===” >> $REPORT_FILE
echo “” >> $REPORT_FILE

# 检查启动时间
BOOT_TIME=$(systemd-analyze | grep “Startup finished” | awk ‘{print $4, $5, $6}’)
echo “Boot time: $BOOT_TIME” >> $REPORT_FILE

# 检查失败服务
FAILED_SERVICES=$(systemctl list-units –failed | grep “loaded failed” | wc -l)
echo “Failed services: $FAILED_SERVICES” >> $REPORT_FILE

echo “” >> $REPORT_FILE
}

# 检查网络
check_network() {
log “Checking network…”

echo “=== Network Check ===” >> $REPORT_FILE
echo “” >> $REPORT_FILE

# 检查网络接口
ip addr show >> $REPORT_FILE

# 检查网络连接
ping -c 4 192.168.1.1 >> $REPORT_FILE

# 检查DNS解析
nslookup www.fgedu.net.cn >> $REPORT_FILE

echo “” >> $REPORT_FILE
}

# 检查磁盘
check_disk() {
log “Checking disk…”

echo “=== Disk Check ===” >> $REPORT_FILE
echo “” >> $REPORT_FILE

# 检查磁盘使用
df -h >> $REPORT_FILE

# 检查磁盘I/O
iostat -x 1 2 >> $REPORT_FILE

# 检查磁盘健康
smartctl -H /dev/sda >> $REPORT_FILE

echo “” >> $REPORT_FILE
}

# 检查进程
check_processes() {
log “Checking processes…”

echo “=== Process Check ===” >> $REPORT_FILE
echo “” >> $REPORT_FILE

# 检查进程状态
ps aux >> $REPORT_FILE

# 检查僵尸进程
ZOMBIE_PROCESSES=$(ps aux | grep -c “defunct”)
echo “Zombie processes: $ZOMBIE_PROCESSES” >> $REPORT_FILE

echo “” >> $REPORT_FILE
}

# 主函数
main() {
log “Starting troubleshooting…”

# 清空报告文件
> $REPORT_FILE

# 检查各项
check_system_boot
check_network
check_disk
check_processes

log “Troubleshooting completed. Report saved to $REPORT_FILE”
}

# 执行主函数
main
EOF

# 2. 设置脚本执行权限
[root@localhost ~]# chmod +x /usr/local/bin/troubleshoot.sh

# 3. 创建日志文件
[root@localhost ~]# touch /var/log/troubleshoot.log
[root@localhost ~]# chmod 644 /var/log/troubleshoot.log

# 4. 测试问题排查脚本
[root@localhost ~]# /usr/local/bin/troubleshoot.sh

# 5. 查看报告
[root@localhost ~]# cat /var/log/troubleshoot-report.txt
=== System Boot Check ===

Boot time: 7.579s
Failed services: 0

=== Network Check ===

1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: mtu 9000 qdisc fq_codel state UP group default qlen 1000
link/ether 00:11:22:33:44:55 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.100/24 brd 192.168.1.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
inet6 fe80::211:22ff:fe33:4455/64 scope link
valid_lft forever preferred_lft forever

PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.123 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=0.123 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=0.123 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=0.123 ms

— 192.168.1.1 ping statistics —
4 packets transmitted, 4 received, 0% packet loss
rtt min/avg/max/mdev = 0.123/0.123/0.123/0.000 ms

=== Disk Check ===

Filesystem Size Used Avail Use% Mounted on
devtmpfs 4.0G 0 4.0G 0% /dev
tmpfs 4.0G 0 4.0G 0% /dev/shm
tmpfs 4.0G 100M 3.9G 3% /run
/dev/mapper/rootvg-rootlv 100G 50G 50G 50% /
/dev/sda1 500M 100M 400M 20% /boot
/dev/mapper/rootvg-datalv 500G 400G 100G 80% /data

=== Process Check ===

USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.1 123456 10240 ? Ss 09:00 0:01 /usr/lib/systemd/systemd –switched-root –system –deserialize 17
root 123 0.0 0.0 65536 5120 ? S< 09:00 0:00 [kworker/0:0H] root 3456 0.5 6.3 2097152 524288 ? S 09:00 1:23 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid root 4567 0.3 0.6 262144 51200 ? S 09:00 0:12 nginx: master process /usr/sbin/nginx root 5678 0.2 0.1 131072 10240 pts/0 R+ 10:00 0:00 ps aux Zombie processes: 0 # 6. 查看日志 [root@localhost ~]# tail -f /var/log/troubleshoot.log [2026-04-03 10:00:00] Starting troubleshooting... [2026-04-03 10:00:01] Checking system boot... [2026-04-03 10:00:02] Checking network... [2026-04-03 10:00:03] Checking disk... [2026-04-03 10:00:04] Checking processes... [2026-04-03 10:00:05] Troubleshooting completed. Report saved to /var/log/troubleshoot-report.txt

学习交流加群风哥QQ113257174

5. 效果验证

验证调优效果。

# 效果验证

# 1. 创建性能对比脚本
[root@localhost ~]# cat > /usr/local/bin/performance-compare.sh << 'EOF' #!/bin/bash # script.sh # from:www.itpux.com.qq113257174.wx:itpux-com # web: http://www.fgedu.net.cn # 性能对比脚本 LOG_FILE="/var/log/performance-compare.log" REPORT_FILE="/var/log/performance-compare-report.txt" # 记录日志函数 log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> $LOG_FILE
}

# 测试CPU性能
test_cpu() {
log “Testing CPU performance…”

echo “=== CPU Performance Test ===” >> $REPORT_FILE
echo “” >> $REPORT_FILE

# CPU使用率
CPU_USAGE=$(top -bn1 | grep “Cpu(s)” | awk ‘{print $2}’ | sed ‘s/us,//’)
echo “CPU Usage: ${CPU_USAGE}%” >> $REPORT_FILE

# 负载平均值
LOAD_AVG=$(uptime | awk -F’load average:’ ‘{print $2}’)
echo “Load Average:${LOAD_AVG}” >> $REPORT_FILE

echo “” >> $REPORT_FILE
}

# 测试内存性能
test_memory() {
log “Testing memory performance…”

echo “=== Memory Performance Test ===” >> $REPORT_FILE
echo “” >> $REPORT_FILE

# 内存使用率
MEMORY_USAGE=$(free | grep Mem | awk ‘{printf(“%.0f”), $3/$2 * 100.0}’)
echo “Memory Usage: ${MEMORY_USAGE}%” >> $REPORT_FILE

# 交换使用率
SWAP_USAGE=$(free | grep Swap | awk ‘{printf(“%.0f”), $3/$2 * 100.0}’)
echo “Swap Usage: ${SWAP_USAGE}%” >> $REPORT_FILE

echo “” >> $REPORT_FILE
}

# 测试磁盘I/O性能
test_disk() {
log “Testing disk I/O performance…”

echo “=== Disk I/O Performance Test ===” >> $REPORT_FILE
echo “” >> $REPORT_FILE

# 磁盘I/O测试
dd if=/dev/zero of=/tmp/testfile bs=1G count=1 oflag=direct 2>&1 | grep copied
echo “Disk write test completed.” >> $REPORT_FILE

dd if=/tmp/testfile of=/dev/null bs=1G count=1 iflag=direct 2>&1 | grep copied
echo “Disk read test completed.” >> $REPORT_FILE

rm -f /tmp/testfile

echo “” >> $REPORT_FILE
}

# 测试网络性能
test_network() {
log “Testing network performance…”

echo “=== Network Performance Test ===” >> $REPORT_FILE
echo “” >> $REPORT_FILE

# 网络延迟测试
ping -c 4 192.168.1.1 >> $REPORT_FILE

# 网络带宽测试
iperf3 -c 192.168.1.1 -t 10 >> $REPORT_FILE

echo “” >> $REPORT_FILE
}

# 主函数
main() {
log “Starting performance comparison…”

# 清空报告文件
> $REPORT_FILE

# 测试各项性能
test_cpu
test_memory
test_disk
test_network

log “Performance comparison completed. Report saved to $REPORT_FILE”
}

# 执行主函数
main
EOF

# 2. 设置脚本执行权限
[root@localhost ~]# chmod +x /usr/local/bin/performance-compare.sh

# 3. 测试性能对比脚本
[root@localhost ~]# /usr/local/bin/performance-compare.sh

# 4. 查看报告
[root@localhost ~]# cat /var/log/performance-compare-report.txt
=== CPU Performance Test ===

CPU Usage: 2.5%
Load Average: 0.10, 0.15, 0.12

=== Memory Performance Test ===

Memory Usage: 50%
Swap Usage: 0%

=== Disk I/O Performance Test ===

1+0 records in
1+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 1.2345 s, 870 MB/s
Disk write test completed.
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 0.5678 s, 1.9 GB/s
Disk read test completed.

=== Network Performance Test ===

PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.123 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=0.123 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=0.123 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=0.123 ms

— 192.168.1.1 ping statistics —
4 packets transmitted, 4 received, 0% packet loss
rtt min/avg/max/mdev = 0.123/0.123/0.123/0

风哥提示：

.000 ms

# 总结与建议

# 1. 监控系统部署建议
# – 部署完整的监控系统，包括CPU、内存、磁盘I/O、网络等
# – 配置定时监控任务，定期收集性能数据
# – 配置告警规则，及时发现性能问题

# 2. 性能调优建议
# – 根据实际应用场景选择合适的调优策略
# – 逐步实施调优，每次只调整一个参数
# – 调优后进行性能测试，验证调优效果

# 3. 问题排查建议
# – 系统性地排查问题，从系统启动、网络、磁盘、进程等多个方面检查
# – 使用日志分析工具，快速定位问题
# – 建立问题知识库，积累排查经验

# 4. 效果验证建议
# – 调优前后进行性能对比测试
# – 使用多种测试工具，全面评估性能
# – 长期监控系统性能，验证调优效果

# 5. 持续优化建议
# – 定期进行系统性能评估
# – 根据业务变化调整调优策略
# – 持续学习和实践，提高调优能力