Uploading big files > 512MB
The default maximum file size for uploads is 512MB. You can increase this limit up to what your filesystem and operating system allows. There are certain hard limits that cannot be exceeded:
< 2GB on 32Bit OS-architecture
< 2GB with IE6 - IE8
< 4GB with IE9 - IE11
64-bit filesystems have much higher limits; consult the documentation for your filesystem.
The Nextcloud sync client is not affected by these upload limits as it is uploading files in smaller chunks. See Client documentation for more information on configuration options.
Make sure that the latest version of PHP is installed
Disable user quotas, which makes them unlimited
Your temp file or partition has to be big enough to hold multiple parallel uploads from multiple users; e.g. if the max upload size is 10GB and the average number of users uploading at the same time is 100: temp space has to hold at least 10x100 GB
Configuring your Web server
Nextcloud comes with its own
nextcloud/.htaccess file. Because
can’t read PHP settings in
.htaccess these settings must be set in the
Set the following two parameters inside the corresponding php.ini file (see the Loaded Configuration File section of PHP version and information to find your relevant php.ini files)
php_value upload_max_filesize 16G php_value post_max_size 16G
post_max_size settings may not apply to file uploads
through WebDAV single file PUT requests or Chunked file uploads
For those, PHP and webserver timeouts are the limiting factor on the upload size.
Adjust these values for your needs. If you see PHP timeouts in your logfiles, increase the timeout values, which are in seconds:
php_value max_input_time 3600 php_value max_execution_time 3600
Apache module could also stop large uploads from completing. If you’re using this
module and getting failed uploads of large files either disable it in your Apache
config or raise the configured
There are also several other configuration options in your Web server config which could prevent the upload of larger files. Please see the manual of your Web server for how to configure those values correctly:
Apache with mod_fcgid
If you are using Apache/2.4 with mod_fcgid, as of February/March 2016,
FcgidMaxRequestInMem still needs to be significantly increased from its default value
to avoid the occurrence of segmentation faults when uploading big files. This is not a regular
setting but serves as a workaround for Apache with mod_fcgid bug #51747.
FcgidMaxRequestInMem significantly higher than normal may no longer be
necessary, once bug #51747 is fixed.
Apache with mod_proxy_fcgi
Since nginx 1.7.11 a new config option fastcgi_request_buffering
is available. Setting this option to
fastcgi_request_buffering off; in your nginx config
might help with timeouts during the upload. Furthermore it helps if you’re running out of
disc space on the tmp partition of your system.
Make sure that
client_body_temp_path points to a partition with
adequate space for your upload file size, and on the same partition as
tempdirectory (see below). For optimal
performance, place these on a separate hard drive that is dedicated to
swap and temp storage.
If your site is behind a nginx frontend (for example a loadbalancer):
By default, downloads will be limited to 1GB due to
proxy_max_temp_file_size on the frontend.
If you can access the frontend’s configuration, disable proxy_buffering or increase proxy_max_temp_file_size from the default 1GB.
If you do not have access to the frontend, set the X-Accel-Buffering header to
add_header X-Accel-Buffering no;on your backend server.
If you don’t want to use the Nextcloud
.user.ini file, you may
configure PHP instead. Make sure to comment out any lines
pertaining to upload size, if you entered any.
If you are running Nextcloud on a 32-bit system, any
php.ini file needs to be commented out.
Set the following two parameters inside
php.ini, using your own desired
file size values:
upload_max_filesize = 16G post_max_size = 16G
Tell PHP which temp directory you want it to use:
upload_tmp_dir = /var/big_temp_file/
Output Buffering must be turned off in
php.ini, or PHP
will return memory-related errors:
output_buffering = 0
As an alternative to the
upload_tmp_dir of PHP (e.g. if you don’t have access to your
php.ini) you can also configure a temporary location for uploaded files by using the
tempdirectory setting in your
config.php (See Configuration Parameters).
If you have configured the
session_lifetime setting in your
(See Configuration Parameters) file then
make sure it is not too
low. This setting needs to be configured to at least the time (in seconds) that
the longest upload will take. If unsure remove this completely from your
configuration to reset it to the default shown in the
Adjust chunk size on Nextcloud side
For upload performance improvements in environments with high upload bandwidth, the server’s upload chunk size may be adjusted:
sudo -u www-data php occ config:app:set files max_chunk_size --value 20971520
Put in a value in bytes (in this example, 20MB). Set
--value 0 for no chunking at all.
Default is 10485760 (10 MiB).
Large file upload on object storage
Chunked file uploads do have a larger space consumption on the temporary folder when processing those uploads on object storage as the individual chunks get downloaded from the storage and will be assembled to the actual file on the Nextcloud servers temporary directory. It is recommended to increase the size of your temp directory accordingly and also ensure that request timeouts are high enough for PHP, webservers or any load balancers involved.