Match MySQL or MariaDB directly to your memory and CPU cores. To do this, apply the following configuration in your my.ini:
[mysqld] ; with 16GB RAM innodb_buffer_pool_size=4096M tmp-table-size=1024M max-heap-table-size=1024M query_cache_size=1024M ; with 12 CPU cores innodb-buffer-pool-instances=12 max_connections=12000 ; Only use "127.0.0.1", not "localhost" when accessing MySQL ; Remember to also make these changes in the $wgDBserver variable in LocalSettings.php. skip-name-resolve
