Thanks Denis, For now, I will increase the memory. But for records, I will quote the Java doc comments from the interface IgniteDataStreamer interface
* Data streamer is responsible for streaming external data into cache. It achieves it by * properly buffering updates and properly mapping keys to nodes responsible for the data * to make sure that there is the least amount of data movement possible and *optimal * network and memory utilization.* -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/
