diff --git a/src/gausskernel/storage/access/transam/ondemand_extreme_rto/dispatcher.cpp b/src/gausskernel/storage/access/transam/ondemand_extreme_rto/dispatcher.cpp
index 3c96cc7b1..de1db0ab2 100644
--- a/src/gausskernel/storage/access/transam/ondemand_extreme_rto/dispatcher.cpp
+++ b/src/gausskernel/storage/access/transam/ondemand_extreme_rto/dispatcher.cpp
@@ -101,7 +101,7 @@ static const int XLOG_INFO_SHIFT_SIZE = 4; /* xlog info flag shift size */
 
 static const int32 MAX_PENDING = 1;
 static const int32 MAX_PENDING_STANDBY = 1;
-static const int32 ITEM_QUQUE_SIZE_RATIO = 16;
+static const int32 ITEM_QUQUE_SIZE_RATIO = 2;
 
 static const uint32 EXIT_WAIT_DELAY = 100; /* 100 us */
 uint32 g_readManagerTriggerFlag = TRIGGER_NORMAL;