[chore][mds] Adjust config mds_service_write_worker_num.

Author: rock-git

conf/mds.template.conf

@@ -15,8 +15,8 @@
 --mds_service_read_worker_max_pending_num=259072
 --mds_service_read_worker_use_pthread=false
 
---mds_service_write_worker_num=1024
---mds_service_write_worker_max_pending_num=64768
+--mds_service_write_worker_num=4096
+--mds_service_write_worker_max_pending_num=259072
 --mds_service_write_worker_use_pthread=false
 
 # log