mariadb: bump mariadb_table_open_cache to the upstream default of 2000

The upstream default value is 2000 since 10.1.7:
https://mariadb.com/kb/en/server-system-variables/#table_open_cache

See also commit f164d000

playbooks/apollo.yml

@@ -37,7 +37,7 @@
       postgres_max_connections: 1000
       postgres_ssl: 'on'
       postgres_shared_buffers: 4096MB
-    - { role: mariadb, mariadb_innodb_buffer_pool_size: '64M', mariadb_table_open_cache: '256', mariadb_query_cache_type: '0',
+    - { role: mariadb, mariadb_innodb_buffer_pool_size: '64M', mariadb_query_cache_type: '0',
               mariadb_innodb_file_per_table: True }
     - { role: sudo }
     - { role: uwsgi }

playbooks/aur-dev.archlinux.org.yml

@@ -10,7 +10,7 @@
     - { role: root_ssh }
     - { role: certbot }
     - { role: nginx }
-    - { role: mariadb, mariadb_innodb_buffer_pool_size: '64M', mariadb_table_open_cache: '256', mariadb_query_cache_type: '0',
+    - { role: mariadb, mariadb_innodb_buffer_pool_size: '64M', mariadb_query_cache_type: '0',
               mariadb_innodb_file_per_table: True }
     - { role: sudo }
     - { role: php_fpm, php_extensions: ['iconv', 'memcached', 'mysqli', 'pdo_mysql'], zend_extensions: ['opcache'] }

playbooks/aur.archlinux.org.yml

@@ -11,7 +11,7 @@
     - { role: prometheus_exporters }
     - { role: certbot }
     - { role: nginx }
-    - { role: mariadb, mariadb_innodb_buffer_pool_size: '64M', mariadb_table_open_cache: '256', mariadb_query_cache_type: '0',
+    - { role: mariadb, mariadb_innodb_buffer_pool_size: '64M', mariadb_query_cache_type: '0',
               mariadb_innodb_file_per_table: True }
     - { role: sudo }
     - { role: php_fpm, php_extensions: ['iconv', 'memcached', 'mysqli', 'pdo_mysql'], zend_extensions: ['opcache'] }

playbooks/bbs.archlinux.org.yml

@@ -10,7 +10,7 @@
     - { role: root_ssh }
     - { role: certbot }
     - { role: nginx }
-    - { role: mariadb, mariadb_innodb_buffer_pool_size: '64M', mariadb_table_open_cache: '256', mariadb_query_cache_type: '0',
+    - { role: mariadb, mariadb_innodb_buffer_pool_size: '64M', mariadb_query_cache_type: '0',
               mariadb_innodb_file_per_table: True }
     - { role: sudo }
     - { role: php_fpm, php_extensions: ['apcu', 'iconv', 'intl', 'mysqli'], zend_extensions: ['opcache'] }

playbooks/bugs.archlinux.org.yml

@@ -10,7 +10,7 @@
     - { role: root_ssh }
     - { role: certbot }
     - { role: nginx }
-    - { role: mariadb, mariadb_innodb_buffer_pool_size: '64M', mariadb_table_open_cache: '256', mariadb_query_cache_type: '0',
+    - { role: mariadb, mariadb_innodb_buffer_pool_size: '64M', mariadb_query_cache_type: '0',
               mariadb_innodb_file_per_table: True }
     - { role: sudo }
     - { role: php_fpm, php_extensions: ['apcu', 'iconv', 'intl', 'mysqli'], zend_extensions: ['opcache'] }

playbooks/luna.yml

@@ -27,7 +27,7 @@
   roles:
     - nginx
     - spampd
-    - { role: mariadb, mariadb_innodb_buffer_pool_size: '64M', mariadb_table_open_cache: '256', mariadb_query_cache_type: '0',
+    - { role: mariadb, mariadb_innodb_buffer_pool_size: '64M', mariadb_query_cache_type: '0',
               mariadb_innodb_file_per_table: True }
 # luna is hosting mailman lists; this postfix role does not cater to this yet
 # TODO: make postfix role handle mailman config?

roles/mariadb/defaults/main.yml

@@ -4,7 +4,7 @@ mariadb_skip_networking: True
 
 mariadb_key_buffer_size: '16M'
 mariadb_max_allowed_packet: '16M'
-mariadb_table_open_cache: '64'
+mariadb_table_open_cache: '2000'
 mariadb_sort_buffer_size: '1M'
 mariadb_net_buffer_length: '8K'
 mariadb_read_buffer_size: '256K'