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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 (eg, 12.0.2): 18.0.3
Operating system and version (eg, Ubuntu 17.04): Ubuntu 18.04
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.29
PHP version (eg, 7.1): 7.2.24
The issue you are facing:
Server: VM on Hyper V with 4 Cores, 16 GB of Ram, 100GB Drive for OS and 3 TB for /data.
The ram the VM is using in Hyper V manager is about 3 GB, and in the Ubuntu:
I have set up nextcloud for the 4th time, same error, i know that i have not enabled caching, but i try to download a 10GB file from my 20mbits download connection, get a download of 300 kbits.
When i download it elsewhere with a 500mbits download speed, i get my download speed of 2 mbits shown in firefox, the upload from the server is 20mbits.
So i always stop the download on the other machine when i trie the other computer.
i dont get it, is there a limitation anywhere?
thanks!
Is this the first time you’ve seen this error? (Y/N): N
Steps to replicate it:
- just download a file on slower or faster conection
The output of your Nextcloud log in Admin > Logging:
no error.
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
$CONFIG = array (
'instanceid' => '************',
'passwordsalt' => '***************',
'secret' => '*************',
'trusted_domains' =>
array (
0 => '***********'
2 => '*********',
),
'datadirectory' => '/data',
'dbtype' => 'mysql',
'version' => '18.0.3.0',
'overwrite.cli.url' => 'http://******/nextcloud',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => '*******',
'dbpassword' => '***********',
'installed' => true,
'maintenance' => false,
);
The output of your Apache/nginx/system log in /var/log/____:
no errors in the apache2 error.log