How to solve the cassandra batch write to bring the performance problems

Question

when I write to Cassandra in java, my cup usage up to 100%, Specific details are written below:

1. I use 5 threads write to Cassandra cluster;
2. each thread will establish a connection;
3. Write 3000 data in batches at a time, each data is an average of 50KB.

This is the way I write to Cassandra in java： batch_insert_statement

Have you ever met this similar problem? could you tell me something about it? thanks a lot.

update. The following is my computer's details:

cpu-memory-details

Answer 1

You don't have to establish a connection for each thread. Initialize the connection once and allow the threads to utilize that. Establishing connection each time is a costly act.