| IUS mysql56u 5.6 | Fedora community-mysql 5.7
------------------------|---------------------------|--------------------------- ignore_db_dir | lost+found | tmpdir | /var/lib/mysqltmp | /var/tmp table_definition_cache | 4096 | 1400 table_open_cache | 4096 | 2000 max_connections | 400 | 151 max_connect_errors | 1000000 | 100 max_allowed_packet | 16M | 4M skip_name_resolve | 1 | 0 wait_timeout | 600 | 28800 key_buffer_size | 32M | 8M myisam_sort_buffer_size | 128M | 8M expire_logs_days | 7 | 0 relay_log_space_limit | 16G | 0 server_id | 1 | 0 open_files_limit | 65535 | 5000