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  3. Huge memory spikes

Huge memory spikes

Scheduled Pinned Locked Moved Support
cpumemory
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  • robiR Offline
    robiR Offline
    robi
    wrote on last edited by girish
    #1

    Something is regularly causing huge memory spikes. Since all apps have limits this shouldn't be possible.
    Here's the 6h graphs:

    01209e45-ac3a-4c6d-8efc-9378a824aaaf-image.png

    CPU correlates
    2f3c3405-e21a-49c3-ad29-1527353d1933-image.png

    I don't see anything other than occasional janitor cleanup that lasts on the order of seconds, not minutes, in box log (8MB)

    What else?

    Here's the 24h graphs:
    26d6ff1b-7d67-4014-9375-7f84c3fd9a5c-image.png
    24d4174f-860a-48d2-99d6-da1b47cf66b4-image.png

    Conscious tech

    girishG 1 Reply Last reply
    0
    • robiR robi

      Something is regularly causing huge memory spikes. Since all apps have limits this shouldn't be possible.
      Here's the 6h graphs:

      01209e45-ac3a-4c6d-8efc-9378a824aaaf-image.png

      CPU correlates
      2f3c3405-e21a-49c3-ad29-1527353d1933-image.png

      I don't see anything other than occasional janitor cleanup that lasts on the order of seconds, not minutes, in box log (8MB)

      What else?

      Here's the 24h graphs:
      26d6ff1b-7d67-4014-9375-7f84c3fd9a5c-image.png
      24d4174f-860a-48d2-99d6-da1b47cf66b4-image.png

      girishG Offline
      girishG Offline
      girish
      Staff
      wrote on last edited by
      #2

      @robi The only CPU/memory intensive thing the box code does is backups. Do the spikes match your backup interval configuration?

      robiR 1 Reply Last reply
      0
      • girishG girish

        @robi The only CPU/memory intensive thing the box code does is backups. Do the spikes match your backup interval configuration?

        robiR Offline
        robiR Offline
        robi
        wrote on last edited by
        #3

        @girish No, that is why these are concerning. My backups are weekly.

        This is happening on the demo cloudron as well.

        Conscious tech

        girishG 1 Reply Last reply
        0
        • robiR robi

          @girish No, that is why these are concerning. My backups are weekly.

          This is happening on the demo cloudron as well.

          girishG Offline
          girishG Offline
          girish
          Staff
          wrote on last edited by
          #4

          @robi said in Huge memory spikes:

          This is happening on the demo cloudron as well.

          It seems that they are somehow related to OOM in the demo cloudron atleast:

          # grep OOM /home/yellowtent/platformdata/logs/box.log | wc -l
          3572
          

          Which now reminds me that I think your server is also on ssdnodes as well right ? They have some strange CPU/memory sharing going on which makes all that I/O unreliable. I have been meaning to move the demo out of them at some point. If you just try to uninstall an app, you will see how slow it is despite it having plenty of RAM (48GB overall!) and it's doing nothing.

          robiR 1 Reply Last reply
          1
          • girishG girish

            @robi said in Huge memory spikes:

            This is happening on the demo cloudron as well.

            It seems that they are somehow related to OOM in the demo cloudron atleast:

            # grep OOM /home/yellowtent/platformdata/logs/box.log | wc -l
            3572
            

            Which now reminds me that I think your server is also on ssdnodes as well right ? They have some strange CPU/memory sharing going on which makes all that I/O unreliable. I have been meaning to move the demo out of them at some point. If you just try to uninstall an app, you will see how slow it is despite it having plenty of RAM (48GB overall!) and it's doing nothing.

            robiR Offline
            robiR Offline
            robi
            wrote on last edited by
            #5

            @girish That's not it. You have OOMs because people install all sorts of apps and try to abuse the system, like WP and trying out large plugins.

            My system has 0 OOMs. None.

            Mine also has enough of IO as I asked them to limit the number of new customers on the host system.

            # dd if=/dev/zero of=/tmp/test1.img bs=1G count=1 oflag=dsync ; rm /tmp/test1.img
            1+0 records in
            1+0 records out
            1073741824 bytes (1.1 GB, 1.0 GiB) copied, 5.50861 s, 195 MB/s
            

            Doesn't explain 48GB mem spikes.

            This only seems to be happening on 20.04 Cloudrons, not 18.04.

            Btw, the main issue I think you're having is the choice of that NY datacenter, it's networking isn't great, they seem to allow burst traffic but then quickly throttle down or experience congestion.

            Seattle has been way better for me.

            Conscious tech

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