diff --git a/conf/tracker.conf b/conf/tracker.conf
index 79a548d..5e28136 100644
--- a/conf/tracker.conf
+++ b/conf/tracker.conf
@@ -119,8 +119,8 @@ sync_log_buff_interval = 10
 check_active_interval = 120
 
 # thread stack size, should >= 64KB
-# default value is 64KB
-thread_stack_size = 64KB
+# default value is 256KB
+thread_stack_size = 256KB
 
 # auto adjust when the ip address of the storage server changed
 # default value is true