Converting Database Type
SQLite is good for testing ownCloud, as well as small, single-user, ownCloud servers. But, it does not scale for large, multi-user sites. If you have an existing ownCloud installation which uses SQLite, and you want to convert to a better performing database, such as MySQL, MariaDB or PostgreSQL, you can use the ownCloud command line tool: occ.
|ownCloud Enterprise edition does not support SQLite.|
Add the following to your ownCloud
'mysql.utf8mb4' => true,
Add, or adjust, the following in
You can do the same for MySQL by replacing
key_buffer_size = 32M table_cache = 400 query_cache_size = 128M #in InnoDB: innodb_flush_method=O_DIRECT innodb_flush_log_at_trx_commit=1 innodb_log_file_size=256M innodb_log_buffer_size = 128M innodb_buffer_pool_size=2048M innodb_buffer_pool_instances=3 innodb_read_io_threads=4 innodb_write_io_threads=4 innodb_io_capacity = 500 innodb_thread_concurrency=2 innodb_file_format=Barracuda innodb_file_per_table=ON innodb_large_prefix = 1 character-set-server = utf8mb4 collation-server = utf8mb4_general_ci
When you have changed the database parameters, restart your database by running following command:
sudo service mysql restart
After you have restarted the database, run the following occ command in your ownCloud root folder, to convert the database to the new format:
sudo -u www-data php occ db:convert-type [options] type username hostname database
The converter searches for apps in your configured app folders and uses the schema definitions in the apps to create the new table.
As a result, tables of removed apps will not be converted — even with option
To successfully proceed with the conversion, you must type
prompted with the question
Continue with the conversion? On success
the converter will automatically configure the new database in your
If you updated your ownCloud installation then the old tables, which are not used anymore, might still exist. The converter will tell you which ones.
The following tables will not be converted: oc_permissions
You can ignore these tables. Here is a list of known old tables: