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tuned-adm

Choose and check the tuned performance profile (a set of kernel, CPU, disk and power settings).

Niveau
RHCSA-examen
Groep
Processen en jobs
Root nodig
Voor wijzigingen
Pakket
tuned

Dit deel is nog niet vertaald. Je ziet de Engelse tekst.

Wat het doet

The tuned service applies a profile: many settings for one type of system, like a VM, a busy server or a laptop. tuned-adm lists the profiles, shows the active and the recommended one, and switches profiles.

Profiles are in /usr/lib/tuned/ (from packages) and /etc/tuned/ (your own; a profile can include= another and change a few values).

Zo schrijf je het

tuned-adm list | active | recommend | off | verify | profile_mode | auto_profile
tuned-adm profile PROFILE...
tuned-adm profile_info [PROFILE]

Belangrijkste delen

list
All available profiles and the active one.
active
The active profile.
recommend
The profile tuned suggests for this system.
profile NAME...
Switch to a profile (more names = merged).
profile_info [NAME]
Description of a profile.
off
Stop tuning (settings go back).
verify
Check that the profile settings are really applied.
auto_profile
Switch to the recommended profile and automatic mode.
profile_mode
Show if the profile was set by hand or automatically.

Opties 7

Meest gebruikt

-i, --ignore-missing
With verify: ignore settings the system does not support.
-h, --help
Show help.
-v, --version
Show the version.
-d, --debug
Debug output.
-a, --async
Do not wait for the change to finish.
-t, --timeout SECONDS
Timeout for the change.
-l, --loglevel LEVEL
Log level to show.

Voorbeelden 10

$ als gewone gebruiker# als root (of met sudo)

  1. 1Install and start tuned

    dnf install -y tuned
systemctl enable --now tuned

    Often installed already.

  2. 2Which profile is active?

    tuned-adm active
Current active profile: virtual-guest

    RHEL VMs get virtual-guest.

  3. 3Recommended profile

    tuned-adm recommend
virtual-guest

    Based on the hardware and virtualization.

  4. 4Switch profile

    tuned-adm profile throughput-performance

    For a busy physical server.

  5. 5List all profiles

    tuned-adm list

    Shows names with a short description.

  6. 6Learn about a profile

    tuned-adm profile_info powersave

    What it changes.

  7. 7Check that the settings are applied

    tuned-adm verify
Verification succeeded, current system settings match the preset profile.

    If not, see /var/log/tuned/tuned.log.

  8. 8Back to automatic mode

    tuned-adm auto_profile

    tuned picks the recommended profile.

  9. 9Make your own profile

    mkdir /etc/tuned/myweb
printf '[main]\ninclude=throughput-performance\n\n[sysctl]\nvm.swappiness=10\n' > /etc/tuned/myweb/tuned.conf
tuned-adm profile myweb

    Your changes on top of a Red Hat profile.

  10. 10Turn tuning off

    tuned-adm off

    For tests: compare with and without.

Bestanden

/usr/lib/tuned/
Profiles from packages.
/etc/tuned/
Your own profiles; active_profile and profile_mode.
/var/log/tuned/tuned.log
Log.

Exitcodes

0 :: Done. 1 :: Error.

Volledige handleiding

Deze pagina legt het commando uit in eenvoudige woorden. De originele handleiding heeft elk detail.

In je terminal: man 8 tuned-adm

Open de man-pagina (linux.die.net)github.com