For memory usage you can use small command line tool
Also there are number of GUI tools that connect to JMX port, like jvisualvm

Best regards, Vladimir Yudovin,
Winguzone - Hosted Cloud Cassandra
Launch your cluster in minutes.

---- On Mon, 07 Nov 2016 22:25:47 -0500<> wrote ----

Hi All,

I need to do maintenance work for a C* cluster with about 10 nodes. Please recommend a C* operation and maintenance tools you are using.
I also noticed my C* deamon using large memory while doing nothing. Is there any convenent tool to deeply analysize the C* node memory?