Add sample MariaDB and Memcached configs

Author: carlbennett

CONTRIBUTING.md

@@ -91,9 +91,15 @@ Configure these such that nginx is a fastcgi proxy to php-fpm. You'll then run
 
 You should point nginx/php-fpm at the `/main.php` file for all requests.
 
-MariaDB can be seeded by importing the contents of: `/etc/database.sample.sql`
-
-Memcached memory could be increased in: `/etc/sysconfig/memcached`
+MariaDB should be configured with the `TRADITIONAL,NO_AUTO_VALUE_ON_ZERO` modes.
+A sample configuration can be found `etc/mysql-server.sample.cnf`. MariaDB data
+can be seeded by importing the contents of: `/etc/database.sample.sql`
+
+Memcached does not require extra configuration from its package defaults, but
+a sample configuration is available at `etc/memcached.sample.conf`. Memcached
+settings typically are saved to `/etc/sysconfig/memcached` and increasing the
+memory Memcached can use is typically recommended but not required for a
+development environment.
 
 The PHP date timezone should be in UTC, though the code will configure PHP for
 this on its own.

etc/memcached.sample.conf

@@ -0,0 +1,5 @@
+PORT="11211"
+USER="memcached"
+MAXCONN="1024"
+CACHESIZE="256"
+OPTIONS="-l 127.0.0.1,::1"

etc/mysql-server.sample.cnf

@@ -0,0 +1,23 @@
+[mysqld]
+bind-address=*
+binlog-format=row
+character-set-server=utf8
+collation-server=utf8_unicode_ci
+datadir=/var/lib/mysql
+default-storage-engine=InnoDB
+innodb-buffer-pool-size=640M
+innodb_buffer_pool_instances=1
+innodb_file_per_table=ON
+innodb_log_file_size=80M
+log-bin=/var/lib/mysql/mysql-log-bin
+max-allowed-packet=512M
+max-connections=160
+max-heap-table-size=32M
+performance_schema=ON
+query_cache_size=16M
+query_cache_type=1
+server-id=1
+socket=/var/lib/mysql/mysql.sock
+sql-mode=TRADITIONAL,NO_AUTO_VALUE_ON_ZERO
+thread_cache_size=4
+tmp-table-size=32M