mysql 5.6 low memory config for 512MB boxes

to the posterity:

[mysqld]
# memory, so precious
innodb_buffer_pool_size = 32M
innodb_additional_mem_pool_size = 2M
innodb_log_file_size = 5M
innodb_log_buffer_size = 8M
# reclaim a lot (A LOT) of precious memory, we are on a t1.micro
performance_schema = off