After updating to 0.19.5 from 0.19.3 my postgres is often using up 500%+ of CPU according to docker stats and often going to 100% CPU on most cores according to htop. Also noticed in the uptime monitor:

htop shows one of the 5 postgres processes constantly on UPDATE. I think this might be part of the problem.

I’m not comfortable with postgres and am honestly completely in the dark how or where to mitigate or even pinpoint this issue.

Any help would be appreciated.

    • taaz@biglemmowski.winEnglish
      2·
      11 days ago

      hmm, how many connections are used SELECT count(*) FROM pg_stat_activity; ?
      I am not a master postgres admin but my intuition has been that the amount of connections is a big factor in how pg behaves with cpu and mem.

      • DosDude👾@retrolemmy.comOP
        1·
        11 days ago
        ERROR:  extension "pg_stats_statements" is not available

        Even though it’s added in the customPostgresql.conf shared_preload_libraries = 'auto_explain,pg_stat_statements'

          • DosDude👾@retrolemmy.comOP
            2·
            11 days ago

            I added pg_stat_statements, and ran it. This was the result:

            # SELECT count(*) FROM pg_stat_activity;
 count
-------
    11
(1 row)
            • taaz@biglemmowski.winEnglish
              1·
              11 days ago

              do you also have pict-rs connected to this postgres instance? that is surprisingly low number to me, I would have expected anywhere between 20-50 active connections (I use 50 for lemmy and 20 for pict-rs, configured in their respective conf files)