diff --git a/Production-Setup.md b/Production-Setup.md
index f8a1de9..c22fba3 100644
--- a/Production-Setup.md
+++ b/Production-Setup.md
@@ -85,7 +85,7 @@ Additional notes:
 * If the disk space is huge and there will be a lot of volumes, configure `-index=leveldb` to reduce memory load.
 * For windows, `-max=0` does not work. You need to manually set it.
 * For busy volume servers, `-compactionMBps` can help to throttle the background jobs, e.g., compaction, balancing, encoding/decoding,etc.
-* After adding volume servers, there will not be data rebalancing. Data are written to them after new volumes are created on them. You can use `weed shell` and run `volume.balance -force` to manually balance them.
+* After adding volume servers, there will not be data rebalancing. It is generally not a good idea to actively rebalance data, which cost network bandwidth and slows down other servers. Data are written to new servers after new volumes are created on them. You can use `weed shell` and run `volume.balance -force` to manually balance them.
 
 ## Check the object store setup
 Now the object store setup is completed. You can visit `http://<master>:9333/` to check it around.