[root@rhel-server-7-4-x86-64 tmp]# rpm -qa tuned
    tuned-2.8.0-5.el7.noarch
    [root@rhel-server-7-4-x86-64 tmp]# systemctl status tuned.service
    ● tuned.service - Dynamic System Tuning Daemon
    Loaded: loaded (/usr/lib/systemd/system/tuned.service; enabled; vendor preset: enabled)
    Active: active (running) since Sat 2020-06-13 17:36:28 CST; 14min ago
    Main PID: 1018 (tuned)
    CGroup: /system.slice/tuned.service
    └─1018 /usr/bin/python -Es /usr/sbin/tuned -l -P
    Jun 13 17:36:28 rhel-server-7-4-x86-64.novalocal systemd[1]: Starting Dynamic System Tuning Daemon…
    Jun 13 17:36:28 rhel-server-7-4-x86-64.novalocal systemd[1]: Started Dynamic System Tuning Daemon.
    [root@rhel-server-7-4-x86-64 tmp]# tuned-adm list
    Available profiles:
    - balanced - General non-specialized tuned profile
    - desktop - Optimize for the desktop use-case
    - latency-performance - Optimize for deterministic performance at the cost of increased power consumption
    - network-latency - Optimize for deterministic performance at the cost of increased power consumption, focused on low latency network performance
    - network-throughput - Optimize for streaming network throughput, generally only necessary on older CPUs or 40G+ networks
    - powersave - Optimize for low power consumption
    - throughput-performance - Broadly applicable tuning that provides excellent performance across a variety of common server workloads
    - virtual-guest - Optimize for running inside a virtual guest
    - virtual-host - Optimize for running KVM guests
    Current active profile: virtual-guest
    [root@rhel-server-7-4-x86-64 tmp]#

    快速调整

    [root@rhel-server-7-4-x86-64 tmp]# tuned-adm recommend
    virtual-guest
    [root@rhel-server-7-4-x86-64 tmp]# tuned-adm active
    Current active profile: virtual-guest
    [root@rhel-server-7-4-x86-64 tmp]# tuned-adm profile virtual-host
    [root@rhel-server-7-4-x86-64 tmp]# tuned-adm active
    Current active profile: virtual-host
    [root@rhel-server-7-4-x86-64 tmp]#