看了 newrelic 的定价策略，有点疑惑

两种计费方式：

1. Cloud-based: Ideal when running dynamic computing environments in the cloud.
2. Self-hosted: Best when running static environments consisting of hosts managed in your own data center.

Cloud-based 需要购买 compute unit

Self-hosted 需要选择主机数 host

1. Compute Unit: (# of CPU Cores + GB of RAM) x HOURS USED. (increments of 500)
2. Host: A physical machine, virtual machine, or cloud instance that runs your applications.

疑问：

1. Self-hosted 是自己购买云服务器，自己搭建 newrelic 的意思么？所选择的 Host，则是自己使用的应用服务器主机数？
2. Compute Unit，若自己有两台服务器，均为 双核 4G，那么实际上每个月花费的是： （6+6）*750 么？