cat thread pool API

-4 analyze 0 0 0 master-4 ccr 0 0 0 master-4 fetch_shard_started 0 0 0 master -4 fetch_shard_store 0 0 0 master-4 flush 0 0 0 master-4 force_merge 0 0 0 master -4 generic 0 0 0 master-4 get 0 0 0 master-4 index 0 0 0 master -4 listener 0 0 0 master-4 management 1 0 0 master-4 ml_autodetect 0 0 0 master -4 ml_datafeed 0 0 0 master-4 ml_utility 0 0 0 master-4 refresh 0 0 0 master