Crash after lot of files

Hello everyone,

I have a problem on my nextcloud with truenas and nginx.

I explain myself:
When I try to sync big directories (from my pc or from my android device), i got a problem. Nextcloud starts to slow down and then crash. When it crashes, if I try to connect to nextcloud (even on web interface and even if I wait like an hour), nextcloud either takes very long or fails to access.

If I want it to work again, I have to restart the jail directly on truenas, and it is ok again.

Config : 32Gb of Ram with an i3 10105 on a truenas 13.1 server.

Nextcloud version is
Nextcloud client version on my computer is 3.6.4

Here is my nextcloud config :

$CONFIG = array (
  'apps_paths' =>
  array (
    0 =>
    array (
      'path' => '/usr/local/www/nextcloud/apps',
      'url' => '/apps',
      'writable' => true,
    1 =>
    array (
      'path' => '/usr/local/www/nextcloud/apps-pkg',
      'url' => '/apps-pkg',
      'writable' => false,
  'logfile' => '/var/log/nextcloud/nextcloud.log',
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'one-click-instance' => true,
  'one-click-instance.user-limit' => 100,
  'memcache.distributed' => '\\OC\\Memcache\\Redis',
  'memcache.locking' => '\\OC\\Memcache\\Redis',
  'redis' =>
  array (
    'host' => 'localhost',
  'passwordsalt' => 'example',
  'secret' => 'example',
  'trusted_domains' =>
  array (
    0 => 'localhost',
    1 => '192.168.1.X',
    2 => '192.168.1.X',
    3 => ''
  'trusted_proxies' =>
  array (
    0 => '192.168.1.X', #my nginx IP
  'datadirectory' => '/usr/local/www/nextcloud/data',
  'dbtype' => 'mysql',
  'version' => '',
  'dbname' => 'nextcloud',
  'dbhost' => 'localhost',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'mysql.utf8mb4' => true,
  'dbuser' => 'oc_ncadmin',
  'dbpassword' => 'password',
  'installed' => true,
  'instanceid' => 'occ57bkor5zk',
  'overwriteprotocol' => 'https',
  'overwrite.cli.url' => '',
  'overwritehost' => '',
  'overwritewebroot' => '/',
  'htaccess.RewriteBase' => '/',
  'chunkSize' => '5120MB',
  'bulkupload.enabled' => false,

I tried a few things but I don’t know what to try next, do you have any ideas?

There is nothing in nextcloud logs that can indicates an error, and nginx indicates “upstream prematurely closed connection”, but I don’t think the problem come from nginx as I need to restart nextcloud to make it work again.

Edit : I worked a bit on it and saw that plex as no slow down at all, it definitely doesn’t come from nginx reverse proxy.

Edit 2 : I monitored ressources of nextcloud’s jail during upload, the biggest cpu usage is mysql which takes around 15% of the cpu usage, it looks normal to me. But when it begins to slow down, sometimes mysql comes to 0-1% cpu usage, and than goes back to 15%. When it crashes, it stay at 0-1% and there is almost no cpu usage. I really struggle with this.


Does anybody have the same problem here?
Thank you

Ok, new update! I did a fresh install of nextcloud to be sure there is no problem. Everything seemed to work but avec a few Go, it began to do a Network error 99, I added “‘bulkupload.enabled’ => ‘false’” to my nextcloud config but it is still broken…