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Sorry to hear you’re facing problems 
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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version : fpm-alpine 22.01(docker)
Operating system and version (eg, Ubuntu 20.04): alpine(docker background)
Apache or nginx version (eg, Apache 2.4.25): Caddy 2
PHP version (eg, 7.4): default in docker
The issue you are facing:
As the title suggests, my nextcloud is constantly consuming my cpu resources fiercely(For most of the time 200%-400% in docker stats). That should not be a problem if it is normal. But the real trouble it causes is a very slow frontend of my nextcloud instance. In comparison, I run a Synology NAS in my home, I use frp to expose it on this server. The loading time of Nextcloud (about 20-30 sec) , which is up and running on this server, is significantly higher than my synology (5 sec) that is passed through to here.
Another problem that I experienced simultaneously is that Nextcloud forget my login on this browser very often, and most of the time it refused my password when I entered it for the first time. I don’t know if it is going to help to find the cultprint.
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- Just installed the nextcloud docker instant and use, don’t know how specific the problem was created. But I know it can be very fast.
The output of your Nextcloud log in Admin > Logging: The Log is too long, so I paste some representative logs
[index] Error: Argument 1 passed to OC\Group\Manager::getUserIdGroupIds() must be of the type string, null given, called in /var/www/html/lib/private/Group/Manager.php on line 316
GET /apps/deck/
from XXX by XXX at 2021-08-07T12:39:03+00:00
[PHP] Error: Cannot modify header information - headers already sent by (output started at /var/www/html/3rdparty/sabre/http/lib/Sapi.php:132) at /var/www/html/apps/dav/lib/Connector/Sabre/File.php#693
PUT /remote.php/dav/files/User/Notes/Day%20Planners/Day%20Planner-20210807.md
from xx by xxx at 2021-08-07T12:03:20+00:00
[no app in context] Error: Expected filesize of 2670 bytes but read (from Nextcloud client) and wrote (to Nextcloud storage) 0 bytes. Could either be a network problem on the sending side or a problem writing to the storage on the server side.
PUT /remote.php/dav/files/User/Notes/Day%20Planners/Day%20Planner-20210807.md
from 000.000.000.000 by User at 2021-08-07T12:03:20+00:00
[no app in context] Error: An exception occurred while executing a query: SQLSTATE[42000]: Syntax error or access violation: 1253 COLLATION 'utf8mb3_general_ci' is not valid for CHARACTER SET 'utf8mb4'
GET /ocs/v2.php/cloud/users/details?offset=0&limit=25&search=
from 000.000.000.000 by User at 2021-08-07T10:09:29+00:00
[core] Warning: Login failed: 'User' (Remote IP: '000.000.000.000')
POST /login/confirm
from 000.000.000.000 by User at 2021-08-07T06:55:06+00:00
[webdav] Fatal: OC\DB\Exceptions\DbalException: An exception occurred while executing a query: SQLSTATE[HY000]: General error: 4047 InnoDB refuses to write tables with ROW_FORMAT=COMPRESSED or KEY_BLOCK_SIZE.
PROPFIND /remote.php/webdav/Linux_config/autokey
from 000.000.000.000 at 2021-08-07T05:34:42+00:00
[no app in context] Error: An exception occurred while executing a query: SQLSTATE[HY000]: General error: 4047 InnoDB refuses to write tables with ROW_FORMAT=COMPRESSED or KEY_BLOCK_SIZE.
PROPFIND /remote.php/webdav/Linux_config/autokey
from 000.000.000.000 at 2021-08-07T05:34:42+00:00
[caldav] Fatal: OC\DB\Exceptions\DbalException: An exception occurred while executing a query: SQLSTATE[HY000]: General error: 4047 InnoDB refuses to write tables with ROW_FORMAT=COMPRESSED or KEY_BLOCK_SIZE.
REPORT /remote.php/caldav/calendars/User/inbox-1/
from 000.000.000.000 by User at 2021-08-07T05:34:41+00:00
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'memcache.local' => '\\OC\\Memcache\\APCu',
'apps_paths' =>
array (
0 =>
array (
'path' => '/var/www/html/apps',
'url' => '/apps',
'writable' => false,
),
1 =>
array (
'path' => '/var/www/html/custom_apps',
'url' => '/custom_apps',
'writable' => true,
),
),
'instanceid' => 'ocorm2y3imb5',
'passwordsalt' => 'UHO9j+',
'secret' => '+/',
'trusted_domains' =>
array (
0 => '..',
),
'datadirectory' => '/var/www/html/data',
'dbtype' => 'mysql',
'version' => '22.0.0.11',
'overwrite.cli.url' => '',
'dbname' => 'nextcloud',
'dbhost' => 'mariadb',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => false,
'dbuser' => '',
'dbpassword' => '',
'installed' => true,
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_smtphost' => '..',
'mail_smtpport' => '',
'mail_smtpauth' => 1,
'mail_smtpsecure' => 'tls',
'mail_from_address' => ',
'mail_domain' => '',
'mail_smtpauthtype' => 'LOGIN',
'mail_smtpname' => '',
'mail_smtppassword' => '',
'maintenance' => false,
'loglevel' => 2,
'theme' => '',
);```
The output of your Apache/nginx/system log in `/var/log/____`:
Since my reverse proxy is performing normal to my other services, I think it may not be the problem. Please ask me to post if you think it is useful.
PASTE HERE