I am reading this article. It said "To demonstrate this, let’s take an 8MB file, and fetch it through different sized chunks. In the graph below, we can see that as the block size gets larger, performance improves. As the chunk size decreases, the overhead per-transaction increases, and performance slows down." in section "Set your optimal fetch size".
However, I try to check the Google Cloud Storage settings but there are no "block size", "chunk size" or "fetch size". Where is such a setting?