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  3. Nextcloud take very long time to respond

Nextcloud take very long time to respond

Scheduled Pinned Locked Moved Unsolved Support
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    • C Offline
      C Offline
      chaitanya
      wrote on last edited by
      #1

      Hi

      Suddenly nextcloud takes a very long time to open the home page and clients are timing out. From what I observed in the services section, PostgreSQL is almost running with 100% usage. Also, logs show the error message. Find below screenshot for reference. I do appreciate any recommendation to solve this issue

      Services_Screenshot1.png
      Log_Screenshot.png

      Best regards

      nebulonN 1 Reply Last reply
      0
      • C chaitanya

        Hi

        Suddenly nextcloud takes a very long time to open the home page and clients are timing out. From what I observed in the services section, PostgreSQL is almost running with 100% usage. Also, logs show the error message. Find below screenshot for reference. I do appreciate any recommendation to solve this issue

        Services_Screenshot1.png
        Log_Screenshot.png

        Best regards

        nebulonN Offline
        nebulonN Offline
        nebulon
        Staff
        wrote on last edited by
        #2

        @chaitanya since you also contacted support, I was able to look at the server directly and so far I am not sure what that postgres error about disk space is, the server has enough tmpfs or actual disk space available. I am still investigating what the root case might be.

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        • nebulonN Offline
          nebulonN Offline
          nebulon
          Staff
          wrote on last edited by
          #3

          To update here, restarting the Postgres service made that space issue go away for the memory segment. It is still unclear what this was.

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

            There seem to be two issues here:

            • One some db inconsistency which is causing duplicate errors. This has the same errors as https://forum.cloudron.io/topic/4212/how-to-fix-thes-errors-in-postgresql-logs-related-to-oc_filecache_extended
            • Another is "ERROR: could not resize shared memory segment "/PostgreSQL.1655854505" to 4194304 bytes: No space left on device".

            Investigating the latter. There is a shared_buffers setting in postgresql config which is currently at 64MB. Then docker has a default --shm-size of 64MB as well (https://github.com/moby/moby/issues/29492). The default is in fact 128MB per https://www.postgresql.org/docs/12/runtime-config-resource.html these days. I will fix our container and docker configuration.

            More info:

            • https://github.com/docker-library/postgres/issues/416
            • https://www.postgresql.org/message-id/CAEepm%3D2wXSfmS601nUVCftJKRPF%3DPRX%2BDYZxMeT8M2WwLSanVQ%40mail.gmail.com
            • https://leopard.in.ua/2013/09/05/postgresql-sessting-shared-memory
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            • girishG Offline
              girishG Offline
              girish
              Staff
              wrote on last edited by
              #5

              There's also some cryptic math here - https://www.oreilly.com/library/view/postgresql-10-high/9781788474481/cfcdb792-38e6-42c9-b60b-3c0a86007aa4.xhtml

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              • girishG Offline
                girishG Offline
                girish
                Staff
                wrote on last edited by
                #6

                I have made a fix here - https://git.cloudron.io/cloudron/box/-/commit/949b2e2530283e1690656c2dd417e00a78b3251d . I am still monitoring @chaitanya's server to see the impact the change has.

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