hnagato

net.inet.tcp.delayed_ack=0
net.inet.tcp.recvspace=1027840
net.inet.tcp.sendspace=134320
net.inet.udp.recvspace=88320
net.local.stream.sendspace=65536
net.local.stream.recvspace=65536

hnagato

rds-modify-db-parameter-group {param-group-name} \
--parameters="name=character_set_server, value=utf8, method=pending-reboot" \
--parameters="name=collation_server, value=utf8_general_ci, method=pending-reboot" \
--parameters="name=tmp_table_size, value={DBInstanceClassMemory/16}, method=pending-reboot" \
--parameters="name=max_heap_table_size, value={DBInstanceClassMemory/16}, method=pending-reboot" \
--parameters="name=query_cache_type, value=1, method=pending-reboot" \
--parameters="name=query_cache_size, value={DBInstanceClassMemory/32}, method=pending-reboot" \
--parameters="name=table_open_cache, value=2500, method=pending-reboot" \
--parameters="name=join_buffer_size, value={DBInstanceClassMemory/64}, method=pending-reboot" \
--parameters="name=thread_cache_size, value={DBInstanceClassMemory/12582880}, method=pending-reboot" \

hnagato

Install rbenv and ruby-build to Amazon Linux (cloud-init).

1. Copy & paste content of user-data.sh to EC2 RunInstances user-data
2. Then, logging in to EC2 instance as ec2-user and run install-ruby.sh.