Using c1.medium, we are currently able to deliver the service. What is the the benefit of having more memory ? I mean, I don't understand why having 1, 2, 4, 8 or 16 GB of memory is so different. In my mind, Cassandra will fill the heap and from then, start to flush and compact to avoid OOMing and fill it again. The memory used inside the heap will remains close to the max memory available, therefore having more or less memory doesn't matter.
I'm pretty sure I misunderstand or forget something about how the memory is used but not sure about what. Can you enlighten me about this point ? If I understand why the memory size is that important I will probably be able to argue about the importance of having more memory and my boss will probably allow me to spend more money to get better servers. "There are some changes you can make to mitigate things (let me know if you need help), but this is essentially a memory problem." I'm interested a lot in learning about some configuration I can use to reach better peformance/stability as well as in learning about how Cassandra works. Thanks for the help you give to people and for sharing your knowledge with us. I appreciate a lot the Cassandra community and the most active people keeping it alive. It's worth being said :). Alain
