Connection timeout

Hello
I have problem when ~10 users synchronize at the same time I can’t access web interface or connect more users in clients. Connection time out. But server have ~5% load and 1gb ram usage of 8gb.
There are about 700 files for ~1gb
Its clean install ubuntu 20.04+10.5owncloud+mariadb+apache and SSL and latest desktop clients

After searching those are all changes I did to server but no results

apache prefork
StartServers 10
MinSpareServers 20
MaxSpareServers 40
ServerLimit 60
MaxRequestWorkers 512
MaxConnectionsPerChild 10000

mysql
max_allowed_packet = 512M
thread_cache_size = 100
max_connections = 500
innodb_buffer_pool_size=6G
innodb_io_capacity = 2000
innodb_read_io_threads = 64
innodb_thread_concurrency = 0
innodb_write_io_threads = 64
table_open_cache = 1000000
tmp-table-size = 1G
max-heap-table-size = 1G
innodb_flush_method = O_DIRECT
query_cache_type = 1
query_cache_limit = 2M
query_cache_min_res_unit = 4k
query_cache_size = 128M

owncloud config

$CONFIG = array (
‘instanceid’ => ‘ochf6dt43gee’,
‘passwordsalt’ => ‘ITNzrdUMUVzFwT1sbOSXTVkrtXtfw5’,
‘secret’ => ‘9Qm9DaOzYzSedqD+zdKpPTydewu4wgTV7Gwi3sgL7QrjJm7G’,
‘trusted_domains’ =>
array (
0 => ‘######’,
),
‘datadirectory’ => ‘/var/www/owncloud/data’,
‘overwrite.cli.url’ => ‘https://######/owncloud’,
‘dbtype’ => ‘mysql’,
‘version’ => ‘10.5.0.10’,
‘dbname’ => ‘owncloud_db’,
‘dbhost’ => ‘localhost’,
‘dbtableprefix’ => ‘oc_’,
‘mysql.utf8mb4’ => true,
‘dbuser’ => ‘owncloud_user’,
‘dbpassword’ => ‘########’,
‘logtimezone’ => ‘UTC’,
‘apps_paths’ =>
array (
0 =>
array (
‘path’ => ‘/var/www/owncloud/apps’,
‘url’ => ‘/apps’,
‘writable’ => false,
),
1 =>
array (
‘path’ => ‘/var/www/owncloud/apps-external’,
‘url’ => ‘/apps-external’,
‘writable’ => true,
),
),
‘installed’ => true,
‘memcache.local’ => ‘\OC\Memcache\APCu’,
‘filelocking.enabled’ => true,
‘memcache.locking’ => ‘\OC\Memcache\Redis’,
‘redis’ =>
array (
‘host’ => ‘localhost’,
‘port’ => 6379,
‘timeout’ => 0.0,
‘password’ => ‘’,
),
‘loglevel’ => 1,
);

Hey,

i think you could have a look at the web server, PHP, MySQL and owncloud.log log files to see if you can find any hints why the connection during the sync of the clients is stopping / getting terminated.

Maybe some of the topics from https://central.owncloud.org/search?q="connection%20timeout"%20order%3Alatest like the following are relevant too?