Red Hat Summit Red Hat SummitSupportKonsoleEntwicklerDemo startenKontakt

Dieser Inhalt ist in der von Ihnen ausgewählten Sprache nicht verfügbar.

15.2. Removing Swap Space

Sometimes it can be prudent to reduce swap space after installation. For example, you have downgraded the amount of RAM in your system from 1 GB to 512 MB, but there is 2 GB of swap space still assigned. It might be advantageous to reduce the amount of swap space to 1 GB, since the larger 2 GB could be wasting disk space.
You have three options: remove an entire LVM2 logical volume used for swap, remove a swap file, or reduce swap space on an existing LVM2 logical volume.

15.2.1. Reducing Swap on an LVM2 Logical Volume
Link kopieren

To reduce an LVM2 swap logical volume (assuming /dev/VolGroup00/LogVol01 is the volume you want to reduce):

Procedure 15.3. Reducing an LVM2 Swap Logical Volume

  1. Disable swapping for the associated logical volume: 
    # swapoff -v /dev/VolGroup00/LogVol01
    Copy to Clipboard Toggle word wrap
  2. Reduce the LVM2 logical volume by 512 MB: 
    # lvreduce /dev/VolGroup00/LogVol01 -L -512M
    Copy to Clipboard Toggle word wrap
  3. Format the new swap space: 
    # mkswap /dev/VolGroup00/LogVol01
    Copy to Clipboard Toggle word wrap
  4. Activate swap on the logical volume: 
    # swapon -v /dev/VolGroup00/LogVol01
    Copy to Clipboard Toggle word wrap
  5. To test if the swap logical volume was successfully reduced, inspect active swap space: 
    $ cat /proc/swaps
$ free -h
    Copy to Clipboard Toggle word wrap

15.2.2. Removing an LVM2 Logical Volume for Swap
Link kopieren

To remove a swap volume group (assuming /dev/VolGroup00/LogVol02 is the swap volume you want to remove):

Procedure 15.4. Remove a Swap Volume Group

  1. Disable swapping for the associated logical volume: 
    # swapoff -v /dev/VolGroup00/LogVol02
    Copy to Clipboard Toggle word wrap
  2. Remove the LVM2 logical volume: 
    # lvremove /dev/VolGroup00/LogVol02
    Copy to Clipboard Toggle word wrap
  3. Remove the following associated entry from the /etc/fstab file: 
    /dev/VolGroup00/LogVol02   swap     swap    defaults     0 0
    Copy to Clipboard Toggle word wrap
  4. Regenerate mount units so that your system registers the new configuration: 
    # systemctl daemon-reload
    Copy to Clipboard Toggle word wrap
  5. Remove all references to the removed swap storage from the /etc/default/grub file: 
    # vi /etc/default/grub
    Copy to Clipboard Toggle word wrap
  6. Rebuild the grub configuration:
    1. on BIOS-based machines, run: 
      # grub2-mkconfig -o /boot/grub2/grub.cfg
      Copy to Clipboard Toggle word wrap
    2. on UEFI-based machines, run: 
      # grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg
      Copy to Clipboard Toggle word wrap
  7. To test if the logical volume was successfully removed, inspect active swap space: 
    $ cat /proc/swaps
$ free -h
    Copy to Clipboard Toggle word wrap

15.2.3. Removing a Swap File
Link kopieren

To remove a swap file:

Procedure 15.5. Remove a Swap File

  1. At a shell prompt, execute the following command to disable the swap file (where /swapfile is the swap file): 
    # swapoff -v /swapfile
    Copy to Clipboard Toggle word wrap
  2. Remove its entry from the /etc/fstab file.
  3. Regenerate mount units so that your system registers the new configuration: 
    # systemctl daemon-reload
    Copy to Clipboard Toggle word wrap
  4. Remove the actual file: 
    # rm /swapfile
    Copy to Clipboard Toggle word wrap
Nach oben
Red Hat logoGithubredditYoutubeTwitter

Lernen

Testen, kaufen und verkaufen

Communitys

Über Red Hat Dokumentation

Wir helfen Red Hat Benutzern, mit unseren Produkten und Diensten innovativ zu sein und ihre Ziele zu erreichen – mit Inhalten, denen sie vertrauen können. Entdecken Sie unsere neuesten Updates.

Mehr Inklusion in Open Source

Red Hat hat sich verpflichtet, problematische Sprache in unserem Code, unserer Dokumentation und unseren Web-Eigenschaften zu ersetzen. Weitere Einzelheiten finden Sie in Red Hat Blog.

Über Red Hat

Wir liefern gehärtete Lösungen, die es Unternehmen leichter machen, plattform- und umgebungsübergreifend zu arbeiten, vom zentralen Rechenzentrum bis zum Netzwerkrand.

Theme

© 2025 Red Hat