diff --git a/conf/pika.conf b/conf/pika.conf
index db1aef0a9..ec3d60948 100644
--- a/conf/pika.conf
+++ b/conf/pika.conf
@@ -338,7 +338,7 @@ max-bytes-for-level-multiplier : 10
 slotmigrate : no
 
 # slotmigrate thread num
-slotmigrate-thread-num : 8
+slotmigrate-thread-num : 1
 
 # thread-migrate-keys-num  1/8 of the write_buffer_size_
 thread-migrate-keys-num : 64