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Cloudron Forum

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  1. Cloudron Forum
  2. Support
  3. Please disable transparent hugepage

Please disable transparent hugepage

Scheduled Pinned Locked Moved Solved Support
redisserver
16 Posts 4 Posters 3.2k Views 4 Watching
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    • nebulonN nebulon

      In this case we have to do this for the whole server. Not sure yet if that is a good idea or not, since there are various different payloads. However from what I've read so far, especially databases, not just redis, could profit. As also mentioned for mongodb at https://docs.mongodb.com/manual/tutorial/transparent-huge-pages/

      That being said in the servers I have checked now, the default actually seems to be madvise for THP, which according to https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/performance_tuning_guide/sect-red_hat_enterprise_linux-performance_tuning_guide-configuring_transparent_huge_pages is a much better option as the process can control the behavior on its own.

      I might be wrong but it seems the recommendation for option never is a bit outdated by now?

      JOduMonTJ Offline
      JOduMonTJ Offline
      JOduMonT
      wrote on last edited by
      #3

      @nebulon said in Please disable transparent hugepage:

      I might be wrong but it seems the recommendation for option never is a bit outdated by now?

      hopefully,

      thank for your research, I forget to look before.

      I'll forward these to nextcloud, maybe they have to update their warning

      the first time I eared about it in a talk from Brendan Gregg (Netflix) and I was full of hope by using RIP CoreOS

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      • nebulonN Offline
        nebulonN Offline
        nebulon
        Staff
        wrote on last edited by
        #4

        Thanks, if you forward that information publicly and have a link, it would be great if you can put it here so we can also follow such a thread.

        JOduMonTJ 1 Reply Last reply
        0
        • girishG Offline
          girishG Offline
          girish
          Staff
          wrote on last edited by girish
          #5

          This warning is coming from redis and not from nextcloud (so I don't this the nextcloud devs can help)

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          • nebulonN nebulon

            Thanks, if you forward that information publicly and have a link, it would be great if you can put it here so we can also follow such a thread.

            JOduMonTJ Offline
            JOduMonTJ Offline
            JOduMonT
            wrote on last edited by
            #6

            @nebulon said in Please disable transparent hugepage:

            if you forward that information publicly and have a link

            I know I do play renagate here
            https://github.com/redis/redis-rcp/issues/22
            maxresdefault.jpg

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            • girishG Offline
              girishG Offline
              girish
              Staff
              wrote on last edited by
              #7

              Thanks for reporting upstream 🙂 Let's wait for their response.

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              • JOduMonTJ Offline
                JOduMonTJ Offline
                JOduMonT
                wrote on last edited by
                #8

                FYI, whonix also recommend to disable HugePage as it is possible to tamper the data on transit
                https://www.whonix.org/wiki/KVM#HugePages

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                • girishG Offline
                  girishG Offline
                  girish
                  Staff
                  wrote on last edited by
                  #9

                  This is disabled in https://git.cloudron.io/cloudron/box/-/commit/213ce114e32e6a880506e24a79b8dc1d7d2d0784

                  J 1 Reply Last reply
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                  • girishG girish

                    This is disabled in https://git.cloudron.io/cloudron/box/-/commit/213ce114e32e6a880506e24a79b8dc1d7d2d0784

                    J Offline
                    J Offline
                    johan
                    wrote on last edited by
                    #10

                    @girish Trying a new install from scratch today (Ubuntu 20.04) and cloudron-disable-thp is stuck:

                    Dec 07 18:18:22 cloudron systemd[1]: Starting Disable Transparent Huge Pages (THP)...
                    Dec 07 18:18:22 cloudron sh[3229]: tee: /sys/kernel/mm/transparent_hugepage/enabled: No such file or directory
                    Dec 07 18:18:22 cloudron systemd[1]: cloudron-disable-thp.service: Main process exited, code=exited, status=1/FAILURE
                    Dec 07 18:18:22 cloudron systemd[1]: cloudron-disable-thp.service: Failed with result 'exit-code'.
                    Dec 07 18:18:22 cloudron systemd[1]: Failed to start Disable Transparent Huge Pages (THP).
                    
                    girishG 1 Reply Last reply
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                    • J johan

                      @girish Trying a new install from scratch today (Ubuntu 20.04) and cloudron-disable-thp is stuck:

                      Dec 07 18:18:22 cloudron systemd[1]: Starting Disable Transparent Huge Pages (THP)...
                      Dec 07 18:18:22 cloudron sh[3229]: tee: /sys/kernel/mm/transparent_hugepage/enabled: No such file or directory
                      Dec 07 18:18:22 cloudron systemd[1]: cloudron-disable-thp.service: Main process exited, code=exited, status=1/FAILURE
                      Dec 07 18:18:22 cloudron systemd[1]: cloudron-disable-thp.service: Failed with result 'exit-code'.
                      Dec 07 18:18:22 cloudron systemd[1]: Failed to start Disable Transparent Huge Pages (THP).
                      
                      girishG Offline
                      girishG Offline
                      girish
                      Staff
                      wrote on last edited by
                      #11

                      @johan Which VPS provider is this? Looks like that file is missing, maybe that feature was not complied in the kernel.

                      J 1 Reply Last reply
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                      • girishG girish

                        @johan Which VPS provider is this? Looks like that file is missing, maybe that feature was not complied in the kernel.

                        J Offline
                        J Offline
                        johan
                        wrote on last edited by
                        #12

                        @girish I'm using a Scaleway DEV1-M.

                        J 1 Reply Last reply
                        0
                        • J johan

                          @girish I'm using a Scaleway DEV1-M.

                          J Offline
                          J Offline
                          johan
                          wrote on last edited by
                          #13

                          @johan Don't know if that's helpful:

                          uname -r
                          5.4.0-1028-kvm
                          
                          girishG 2 Replies Last reply
                          0
                          • J johan

                            @johan Don't know if that's helpful:

                            uname -r
                            5.4.0-1028-kvm
                            
                            girishG Offline
                            girishG Offline
                            girish
                            Staff
                            wrote on last edited by
                            #14

                            @johan I can reproduce the problem on scaleway, thanks. It seems THP is disabled in the kernel, so the code has to check if the directory exists. Will fix this.

                            1 Reply Last reply
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                            • J johan

                              @johan Don't know if that's helpful:

                              uname -r
                              5.4.0-1028-kvm
                              
                              girishG Offline
                              girishG Offline
                              girish
                              Staff
                              wrote on last edited by
                              #15

                              @johan I have fixed this now - https://git.cloudron.io/cloudron/box/-/commit/f497d5d30929584f5c312a736290c6697c9965d2 . To follow up about the other thread, after you install 5.6.3 and are up and running, do not update to 6.0! Because you will hit this THP issue again on scaleway if you update. We are making 6.0.1, but it will take till end of today since our CI takes forever...

                              J 1 Reply Last reply
                              2
                              • girishG girish

                                @johan I have fixed this now - https://git.cloudron.io/cloudron/box/-/commit/f497d5d30929584f5c312a736290c6697c9965d2 . To follow up about the other thread, after you install 5.6.3 and are up and running, do not update to 6.0! Because you will hit this THP issue again on scaleway if you update. We are making 6.0.1, but it will take till end of today since our CI takes forever...

                                J Offline
                                J Offline
                                johan
                                wrote on last edited by johan
                                #16

                                As I said on the other thread I seem to have managed to install cloudron on Ubuntu 20.04 LTS by following your advice to use ./cloudron-setup --version 5.6.3. I've disabled automatic upgrades and I'll wait a bit to upgrade to version 6.
                                All is good!

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