“Maximum total amount of RAM (GB)” limits the number of instances you can run based on the total aggregate RAM size. For example, with the default limit of 50GB, you may launch a maximum of 200 256MB cloud servers, or 100 512MB cloud servers, or 50 1GB cloud servers, or 20 2GB + 40 256MB cloud servers, etc. These limits apply to creating as well as resizing servers.

Table 3.5. Default Absolute Limits
Limit Default
Maximum total amount of RAM (GB) 50
Maximum number of shared IP groups 25
Maximum number of members per shared IP group 25