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A New Chapter for MagicMirror: The Community Takes the Lead
Read the statement by Michael Teeuw here.

All of a sudden SSH is really lagging/slow.

Scheduled Pinned Locked Moved Troubleshooting
16 Posts 4 Posters 9.7k Views 4 Watching
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  • M Offline
    Mar @yawns
    last edited by Mar 22, 2017, 8:50 AM

    @yawns thanks for the reply. Yes I’ve restarted it many-many times in the last few days. Valid question.

    S 1 Reply Last reply Mar 22, 2017, 9:02 AM Reply Quote 0
    • Y Offline
      yawns Moderator
      last edited by yawns Mar 22, 2017, 10:27 AM Mar 22, 2017, 9:01 AM

      Ok. Is your pi connected with wifi or lan?

      You could try this:

      sudo nano /etc/ssh/sshd_config, then add UseDNS no to the file and save your changes. Afterwards reboot your pi or run sudo service ssh restart

      M 1 Reply Last reply Mar 22, 2017, 10:13 AM Reply Quote 0
      • S Offline
        Snille Module Developer @Mar
        last edited by Snille Mar 22, 2017, 9:03 AM Mar 22, 2017, 9:02 AM

        @Mar If you get in to SSH, check if you have a HUGE file called “core” in your MagicMirror directory. If you do, delete it. I have had the same issue, EVERYTHING get’s slow and eventually you cant do anything. I noticed the file on my second install (again) and deleted it before it died. Now I’m trying to find how this file get’s created. It should not be there.

        If you cant find it, make it and share it!
        Modules: MMM-homeassistant-sensors, MMM-Modulebar, MMM-Profilepicture, MMM-Videoplayer

        S 1 Reply Last reply Mar 22, 2017, 10:11 AM Reply Quote 0
        • S Offline
          strawberry 3.141 Project Sponsor Module Developer @Snille
          last edited by Mar 22, 2017, 10:11 AM

          @Snille does a module create this file? I don’t have a file called core in my mm directory

          Please create a github issue if you need help, so I can keep track

          S 1 Reply Last reply Mar 22, 2017, 10:14 AM Reply Quote 0
          • M Offline
            Mar @yawns
            last edited by Mar 22, 2017, 10:13 AM

            Thanks for the tips everyone.
            @yawns I’m connected via wifi and in the same room as the router, nothing has changed here. I’ve attempted to add the UseDNS=no but it didnt seem to change the major lag im experiencing. i.e i type and it takes a few seconds for it to show up on the command line. But when I tried ‘UseDNS no’ (as this seemed to be the syntax in the file) it seemed to be a little speedier upon the next reboot! Not near as fast as it was a few weeks back but now i can get in and navigate around etc. Thanks!

            I wonder if there is anything else that could be slowing it down, how does the UsDNS command speed things up like it did?

            @Snille i’ve done an ls -alh in a few of the directories and have no large file name core. Would there be any other temp/log type of files that could be causing a slowdown?

            Y 1 Reply Last reply Mar 22, 2017, 10:26 AM Reply Quote 0
            • S Offline
              Snille Module Developer @strawberry 3.141
              last edited by Mar 22, 2017, 10:14 AM

              @strawberry-3.141 I don’t know yet. I just rebooted my mirror now and got it back again. I’m trying to figuring it out.
              Here is my MagicMirror dir after this reboot…
              The file is there again… :/

              drwxr-xr-x  16 pi pi      4096 Mar 22 11:06 .
              drwxr-xr-x  21 pi pi      4096 Mar 22 11:08 ..
              -rw-r--r--   1 pi pi     11172 Mar 21 13:37 CHANGELOG.md
              drwxr-xr-x   2 pi pi      4096 Mar 21 13:52 config
              -rw-------   1 pi pi 574697472 Mar 22 11:07 core
              drwxr-xr-x   2 pi pi      4096 Mar 21 13:37 css
              -rw-r--r--   1 pi pi       266 Mar 21 13:37 docker-entrypoint.sh
              -rw-r--r--   1 pi pi       378 Mar 21 13:37 Dockerfile
              -rw-r--r--   1 pi pi       964 Mar 21 13:37 .dockerignore
              -rw-r--r--   1 pi pi       132 Mar 21 13:37 .eslintignore
              -rw-r--r--   1 pi pi       319 Mar 21 13:37 .eslintrc.json
              drwxr-xr-x  20 pi pi      4096 Mar 21 13:37 fonts
              drwxr-xr-x   8 pi pi      4096 Mar 22 11:09 .git
              drwxr-xr-x   2 pi pi      4096 Mar 21 13:37 .github
              -rw-r--r--   1 pi pi       915 Mar 21 13:37 .gitignore
              -rw-r--r--   1 pi pi      2173 Mar 21 13:37 Gruntfile.js
              -rw-r--r--   1 pi pi      2337 Mar 21 13:37 index.html
              drwxr-xr-x   3 pi pi      4096 Mar 21 13:37 installers
              drwxr-xr-x   2 pi pi      4096 Mar 21 13:37 js
              -rw-r--r--   1 pi pi       271 Mar 21 13:37 jsconfig.json
              -rw-r--r--   1 pi pi      1118 Mar 21 13:37 LICENSE.md
              drwxr-xr-x  27 pi pi      4096 Mar 22 08:40 modules
              drwxr-xr-x 561 pi pi     20480 Mar 22 10:55 node_modules
              -rw-r--r--   1 pi pi      1789 Mar 21 13:37 package.json
              -rw-r--r--   1 pi pi     11431 Mar 21 13:37 README.md
              -rw-r--r--   1 pi pi       141 Mar 21 13:37 run-start.sh
              drwxr-xr-x   2 pi pi      4096 Mar 21 13:37 serveronly
              -rw-r--r--   1 pi pi       478 Mar 21 13:37 .snyk
              drwxr-xr-x   2 pi pi      4096 Mar 21 13:37 splashscreen
              -rw-r--r--   1 pi pi       126 Mar 21 13:37 .stylelintrc
              drwxr-xr-x   6 pi pi      4096 Mar 21 13:37 tests
              drwxr-xr-x   2 pi pi      4096 Mar 21 13:37 translations
              -rw-r--r--   1 pi pi       229 Mar 21 13:37 .travis.yml
              drwxr-xr-x   3 pi pi      4096 Mar 21 23:24 vendor
              

              If you cant find it, make it and share it!
              Modules: MMM-homeassistant-sensors, MMM-Modulebar, MMM-Profilepicture, MMM-Videoplayer

              S 1 Reply Last reply Mar 22, 2017, 10:16 AM Reply Quote 0
              • S Offline
                strawberry 3.141 Project Sponsor Module Developer @Snille
                last edited by strawberry 3.141 Mar 22, 2017, 10:17 AM Mar 22, 2017, 10:16 AM

                @Snille disable all modules delete this file and put only one module step by step to check what is creating this file. Can you open that file in an editor to get more details?

                @Mar which modules you’re using? how about the cpu usage?

                Please create a github issue if you need help, so I can keep track

                S M 2 Replies Last reply Mar 22, 2017, 10:17 AM Reply Quote 0
                • S Offline
                  Snille Module Developer @strawberry 3.141
                  last edited by Mar 22, 2017, 10:17 AM

                  @strawberry-3.141 That’s what I’m doing right now… :)

                  If you cant find it, make it and share it!
                  Modules: MMM-homeassistant-sensors, MMM-Modulebar, MMM-Profilepicture, MMM-Videoplayer

                  1 Reply Last reply Reply Quote 0
                  • Y Offline
                    yawns Moderator @Mar
                    last edited by Mar 22, 2017, 10:26 AM

                    @Mar
                    Thanks for the feedback. I will change my post and remove the =, so others won’t run into the same mistake.

                    1 Reply Last reply Reply Quote 0
                    • M Offline
                      Mar @strawberry 3.141
                      last edited by Mar 22, 2017, 10:36 AM

                      @strawberry-3.141 My cpu usage (using top) after the pi has booted up stays around 3-5% (using the top command raises this a bit). And memory usage doesnt seem out of control either.

                      top - 10:36:12 up 43 min,  3 users,  load average: 0.14, 0.12, 0.11
                      Tasks: 107 total,   1 running, 100 sleeping,   6 stopped,   0 zombie
                      %Cpu(s):  4.7 us,  1.0 sy,  0.0 ni, 93.9 id,  0.0 wa,  0.0 hi,  0.3 si,  0.0 st
                      KiB Mem:    445084 total,   340880 used,   104204 free,    26108 buffers
                      KiB Swap:   102396 total,        0 used,   102396 free.   159376 cached Mem
                      
                        PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ COMMAND                                      
                        611 pi        20   0  205560  77592  42308 S  3.3 17.4   1:35.69 midori                                       
                       3581 pi        20   0    5232   2596   2160 R  1.6  0.6   0:00.38 top                                          
                         60 root      20   0       0      0      0 S  0.3  0.0   0:02.04 kworker/0:2                                  
                        594 root      19  -1  154840  47040  21040 S  0.3 10.6   0:16.78 Xorg                                         
                       3241 pi        20   0   11940   3440   2768 S  0.3  0.8   0:00.89 sshd                                         
                          1 root      20   0    5308   3776   2736 S  0.0  0.8   0:07.32 systemd                                      
                          2 root      20   0       0      0      0 S  0.0  0.0   0:00.01 kthreadd                                     
                          3 root      20   0       0      0      0 S  0.0  0.0   0:01.17 ksoftirqd/0  
                      

                      Im using the following modules.

                      • profileswitcher, buttons, clock, calendar, compliments, current weather, weather forecast, wunderlist, newsfeed, calendar monthly, tube status, and system stats.
                      S 1 Reply Last reply Mar 22, 2017, 11:16 AM Reply Quote 0
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