OBServer 日志出现 out of px worker resource 的原因

observer.log.20230216153947:[2023-02-16 15:39:40.824005] INFO  [SQL] ob_px_admission.cpp:160 [7696][0][YB42C0A800B8-0005E32EC1D6FEB4-0-0] [lt=10] [dc=0] It's a px query, out of px worker resource, need delay, do not need disconnect(req_worker_count=24, admit_worker_count=0, plan.get_px_dop()=6, plan.get_plan_id()=10102029, ret=-5307)

obclient > SHOW variables LIKE "parallel_servers_target";

obclient > SET GLOBAL parallel_servers_target=8;