From the documentation and data available on the internet I can vaguely put the size is the number of transactions not being confirmed yet on the blockchain. Which makes sense as it grows when I put load and gradually decreases again. What is confusing me is the bytes field, what does this mean? The bitcoin-cli answer didn't satisfy me. And why doesn't it decrease again? With the below reading is my node endangered to go out of memory. I 'm running mutichain on a 1 GB node.
"size" : 1,
"bytes" : 14819