In this workload we see latency spikes for catalog metadata operations on the config server into the ~20s range, and occasionally the operations timeout at 30s.

Adjust the server parameters and/or test so that the latency for operations is < 1s.

1. Turn off flow control to see if it has any effect, or
2. Reduce the batch size in the workload to limit the per-operation latency on the config server, or
3. Reduce the concurrency to limit the per-operation latency on the config server

Or some combination.