[ceph-users] How to Identify Bottlenecks in RBD job

Hello, I executed a long-running rbd flatten job on the client and expected one of the resources, such as CPU, memory, or network I/O, to reach its maximum usage. However, they didn’t. How can I find the bottleneck to improve performance? Specifically, cpu usage of each msgr-worker thread of rbd is under 60%, network usage is under 30% and memory is rarely used.