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    Simple Linux Swap File Creation

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    linux swap swapfile memory
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    • black3dynamiteB
      black3dynamite
      last edited by

      When I was using Ubuntu Desktop, I used swapfile instead of a swap partition just so I don't have to waste disk space.

      scottalanmillerS 1 Reply Last reply Reply Quote 1
      • scottalanmillerS
        scottalanmiller @black3dynamite
        last edited by

        @black3dynamite said in Simple Linux Swap File Creation:

        When I was using Ubuntu Desktop, I used swapfile instead of a swap partition just so I don't have to waste disk space.

        Ubuntu has moved to it as the default, now.

        black3dynamiteB 1 Reply Last reply Reply Quote 0
        • black3dynamiteB
          black3dynamite @scottalanmiller
          last edited by

          @scottalanmiller said in Simple Linux Swap File Creation:

          @black3dynamite said in Simple Linux Swap File Creation:

          When I was using Ubuntu Desktop, I used swapfile instead of a swap partition just so I don't have to waste disk space.

          Ubuntu has moved to it as the default, now.

          When did that start?

          scottalanmillerS dbeatoD 2 Replies Last reply Reply Quote 0
          • scottalanmillerS
            scottalanmiller @black3dynamite
            last edited by

            @black3dynamite said in Simple Linux Swap File Creation:

            @scottalanmiller said in Simple Linux Swap File Creation:

            @black3dynamite said in Simple Linux Swap File Creation:

            When I was using Ubuntu Desktop, I used swapfile instead of a swap partition just so I don't have to waste disk space.

            Ubuntu has moved to it as the default, now.

            When did that start?

            Not all that long ago. two versions back, maybe.

            1 Reply Last reply Reply Quote 0
            • dbeatoD
              dbeato @black3dynamite
              last edited by

              @black3dynamite said in Simple Linux Swap File Creation:

              @scottalanmiller said in Simple Linux Swap File Creation:

              @black3dynamite said in Simple Linux Swap File Creation:

              When I was using Ubuntu Desktop, I used swapfile instead of a swap partition just so I don't have to waste disk space.

              Ubuntu has moved to it as the default, now.

              When did that start?

              Ubuntu 16.04
              https://wiki.ubuntu.com/BionicBeaver/ReleaseNotes

              0_1522965521598_DeepinScreenshot_select-area_20180405175825.png

              1 Reply Last reply Reply Quote 3
              • LakshmanaL
                Lakshmana @scottalanmiller
                last edited by

                @scottalanmiller said in Simple Linux Swap File Creation:

                A simple process for making a swapfile to add swap space to a Linux instance.

                sudo fallocate -l 2G /swapfile
                sudo chmod 600 /swapfile
                sudo mkswap /swapfile
                sudo swapon /swapfile
                sudo echo "/swapfile swap swap defaults 0 0">>/etc/fstab
                

                Or to copypasta as a single line:

                fallocate -l 2G /swapfile && chmod 600 /swapfile && mkswap /swapfile && swapon /swapfile  && echo "/swapfile swap swap defaults 0 0">>/etc/fstab
                

                This can be done in Noobs OS for raspberry tooo?

                scottalanmillerS 1 Reply Last reply Reply Quote 0
                • scottalanmillerS
                  scottalanmiller @Lakshmana
                  last edited by

                  @lakshmana Should work on any Linux.

                  1 Reply Last reply Reply Quote 0
                  • black3dynamiteB
                    black3dynamite @scottalanmiller
                    last edited by

                    @scottalanmiller said in Simple Linux Swap File Creation:

                    A simple process for making a swapfile to add swap space to a Linux instance.

                    sudo fallocate -l 2G /swapfile
                    sudo chmod 600 /swapfile
                    sudo mkswap /swapfile
                    sudo swapon /swapfile
                    sudo echo "/swapfile swap swap defaults 0 0">>/etc/fstab
                    

                    Or to copypasta as a single line:

                    fallocate -l 2G /swapfile && chmod 600 /swapfile && mkswap /swapfile && swapon /swapfile  && echo "/swapfile swap swap defaults 0 0">>/etc/fstab
                    

                    sudo swapon /swapfile wasn't working for me. In /var/log/messages, I was getting these messages.
                    0_1533087006259_6ac4c960-792b-46e4-bd30-3f7bc8b697c2-image.png

                    This works for me:

                    sudo dd if=/dev/zero of=/swapfile count=2048 bs=1MiB
                    sudo chmod 600 /swapfile
                    sudo mkswap /swapfile
                    sudo swapon /swapfile
                    sudo echo "/swapfile swap swap defaults 0 0">>/etc/fstab
                    
                    1 Reply Last reply Reply Quote 0
                    • jmooreJ
                      jmoore @scottalanmiller
                      last edited by

                      @scottalanmiller I think I did something similar a few months back to increase performance. Not sure it did much but I guess it hasn't hurt

                      scottalanmillerS 1 Reply Last reply Reply Quote 0
                      • scottalanmillerS
                        scottalanmiller @jmoore
                        last edited by

                        @jmoore said in Simple Linux Swap File Creation:

                        @scottalanmiller I think I did something similar a few months back to increase performance. Not sure it did much but I guess it hasn't hurt

                        It reduces performance, but increases capacity.

                        dafyreD jmooreJ 2 Replies Last reply Reply Quote 1
                        • dafyreD
                          dafyre @scottalanmiller
                          last edited by

                          @scottalanmiller said in Simple Linux Swap File Creation:

                          @jmoore said in Simple Linux Swap File Creation:

                          @scottalanmiller I think I did something similar a few months back to increase performance. Not sure it did much but I guess it hasn't hurt

                          It reduces performance, but increases capacity.

                          Does using a swapfile vs a swap partition reduce performance to the point it is significantly noticeable?

                          scottalanmillerS 1 Reply Last reply Reply Quote 0
                          • scottalanmillerS
                            scottalanmiller @dafyre
                            last edited by

                            @dafyre said in Simple Linux Swap File Creation:

                            @scottalanmiller said in Simple Linux Swap File Creation:

                            @jmoore said in Simple Linux Swap File Creation:

                            @scottalanmiller I think I did something similar a few months back to increase performance. Not sure it did much but I guess it hasn't hurt

                            It reduces performance, but increases capacity.

                            Does using a swapfile vs a swap partition reduce performance to the point it is significantly noticeable?

                            No, that's why it's done now. Swap should be used SO little, and flexibility trumps the tiny performance increase.

                            1 Reply Last reply Reply Quote 0
                            • jmooreJ
                              jmoore @scottalanmiller
                              last edited by

                              @scottalanmiller Well that explains it lol. It was a long time ago now so don't remember what my logic was, or if there was any at all

                              1 Reply Last reply Reply Quote 0
                              • JaredBuschJ
                                JaredBusch
                                last edited by

                                Just manually installed CentOS 8 for the first time on my local system to test something, and they still use a swap partition by default.

                                Warns you if you delete it.

                                d695d123-0afc-48a5-9a19-cdb145a7de05-image.png

                                black3dynamiteB 1 Reply Last reply Reply Quote 0
                                • black3dynamiteB
                                  black3dynamite @JaredBusch
                                  last edited by

                                  @JaredBusch said in Simple Linux Swap File Creation:

                                  Just manually installed CentOS 8 for the first time on my local system to test something, and they still use a swap partition by default.

                                  Warns you if you delete it.

                                  d695d123-0afc-48a5-9a19-cdb145a7de05-image.png

                                  I automatically ignore Fedora and CentOS warning about that.

                                  black3dynamiteB JaredBuschJ 2 Replies Last reply Reply Quote 0
                                  • black3dynamiteB
                                    black3dynamite @black3dynamite
                                    last edited by

                                    @black3dynamite said in Simple Linux Swap File Creation:

                                    @JaredBusch said in Simple Linux Swap File Creation:

                                    Just manually installed CentOS 8 for the first time on my local system to test something, and they still use a swap partition by default.

                                    Warns you if you delete it.

                                    d695d123-0afc-48a5-9a19-cdb145a7de05-image.png

                                    I ignore Fedora and CentOS warning about that.

                                    1 Reply Last reply Reply Quote 0
                                    • JaredBuschJ
                                      JaredBusch @black3dynamite
                                      last edited by

                                      @black3dynamite said in Simple Linux Swap File Creation:

                                      I automatically ignore Fedora and CentOS warning about that.

                                      I ignored it also. just pointing out the default behavior.

                                      1 Reply Last reply Reply Quote 0
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