title: Postgres streaming replication system requirements
body: <p>I currently have a server setup where my application together with the PostgreSQL database are hosted there. Because the data is really sensitive for our business and we could not afford a disaster scenario I was thinking, as a first step, to setup streaming replication to another server.</p>
  
  <p>The current server has 64GB ram and it handles the ~200tps pretty well. If I am to setup another one for replication does it have to be 'that' big? What if I use a smaller machine e.g. 16GB ram for the slave in order to cut costs? Will this impact performance?</p>
  
  <p>Thank you</p>