Use modern configuration

- Debian buster configuration style
- Drop logrotate management (useless)
- Add new default values in defaults/main.yml (according with MariaDB
doc)
- Travis with Ansible 2.8+

defaults/main.yml

@@ -7,21 +7,17 @@ mariadb_origin: 'default'
 mariadb_use_galera: false
 mariadb_notify_restart: true
 mariadb_upstream_apt_src: false
-mariadb_manage_logrotate: true
 
 # -------------------------------------
 # Configuration
 # -------------------------------------
 
-# MariaDB configuration template
-mariadb_config_template: 'etc/mysql/my.cnf.j2'
-
 # MariaDB connection settings.
 mariadb_port: "3306"
 mariadb_bind_address: '127.0.0.1'
 mariadb_datadir: '/var/lib/mysql'
-mariadb_pid_file: '/var/run/mysqld/mysqld.pid'
-mariadb_socket: '/var/run/mysqld/mysqld.sock'
+mariadb_pid_file: '/run/mysqld/mysqld.pid'
+mariadb_socket: '/run/mysqld/mysqld.sock'
 
 # Slow query log settings.
 mariadb_slow_query_log_enabled: false
@@ -29,37 +25,38 @@ mariadb_slow_query_log_file: '/var/log/mysql/mysql_slow.log'
 mariadb_slow_query_time: 2
 
 # Memory settings (default values optimized ~512MB RAM).
+# Fine Tuning
 mariadb_key_buffer_size: '256M'
 mariadb_max_allowed_packet: '64M'
-mariadb_table_open_cache: '256'
-mariadb_sort_buffer_size: '1M'
+mariadb_max_connections: 100
+mariadb_thread_concurrency: "{{ ansible_processor_cores * 2 }}"
+
+
+mariadb_table_open_cache: '2000'
+mariadb_sort_buffer_size: '2M'
 mariadb_read_buffer_size: '1M'
-mariadb_read_rnd_buffer_size: '4M'
-mariadb_myisam_sort_buffer_size: '64M'
-mariadb_thread_cache_size: '8'
+mariadb_read_rnd_buffer_size: '2M'
+mariadb_myisam_sort_buffer_size: '128M'
+mariadb_thread_cache_size: '256'
 mariadb_query_cache_size: '16M'
 
 # Other settings.
 mariadb_wait_timeout: 28800
 
-# Try number of CPU's * 2 for thread_concurrency.
-mariadb_thread_concurrency: "{{ ansible_processor_cores * 2 }}"
-
 # InnoDB settings.
-mariadb_innodb_file_per_table: '1'
 mariadb_innodb_buffer_pool_size: "{{ (ansible_memtotal_mb * 0.2) | round | int }}M"
 mariadb_innodb_log_file_size: "64M" # If this setting changes on a running system, you will break it! http://dev.mysql.com/doc/refman/5.6/en/innodb-data-log-reconfiguration.html
 mariadb_innodb_log_buffer_size: '8M'
 mariadb_innodb_flush_log_at_trx_commit: '1'
 mariadb_innodb_lock_wait_timeout: 50
 
-# mysqldump settings.
-mariadb_mysqldump_max_allowed_packet: '64M'
-
 # Logging settings.
 mariadb_log_error: '/var/log/mysql/mysql_error.log'
 mariadb_syslog_tag: 'mysql'
 
+# mysqldump settings.
+mariadb_mysqldump_max_allowed_packet: '64M'
+
 # -------------------------------------
 # Extra configuration
 # -------------------------------------