监控工作或识别数据管道中的瓶颈

I am using google cloud datafow. Some of my data pipelines needs to be optimized. I need to understand how workers are performing in the dataflow cluster on these lines . 1. How much memory is being used ? Currently I am logging memory usage using java code . 2. Is there a bottleneck on the disk operations ? To understand whether a SSD is required ? 3. Is there a bottleneck in Vcpus ? So as to increase the Vcpus in workers nodes.I am using google cloud datafow. Some of my dat