How to increase the number of concurrent runs?

[nyte-owl]

I am attempting to backfill hundreds of partitions across a couple different assets. Despite hundreds of runs being queued, I am only seeing 3 to 5 runs in progress. I'd like to increase the number of runs that can execute concurrently.

I am running dagster 1.10.19 locally with dagster dev -m <module_name_with_defs>

I've attempted to set the following in my dagster.yaml, to little effect:

concurrency:
  runs:
    max_concurrent_runs: 32
    tag_concurrency_limits:
      - key: "dagster/backfill"
        limit: 32
    default_op_concurrency_limit: 32

I will note that setting max_concurrent_runs to 1 does limit the runs in progress to 1 properly. But I still don't see more than 3 to 5 in progress when that same config is set to 32. This leads me to believe there is some other limit affecting the number of concurrent runs here that I'm running up against.