diff --git a/src/query/inc/qExtbuffer.h b/src/query/inc/qExtbuffer.h
index 36fc0c9820a8338973e718c473e7619da1990ad8..0bdcf5c45ef6d9ce283d36ccd9d7b6296fc67472 100644
--- a/src/query/inc/qExtbuffer.h
+++ b/src/query/inc/qExtbuffer.h
@@ -29,7 +29,7 @@ extern "C" {
 
 #define MAX_TMPFILE_PATH_LENGTH        PATH_MAX
 #define INITIAL_ALLOCATION_BUFFER_SIZE 64
-#define DEFAULT_PAGE_SIZE              (4096L)  // 16k larger than the SHistoInfo
+#define DEFAULT_PAGE_SIZE              (1024L)  // 16k larger than the SHistoInfo
 
 typedef enum EXT_BUFFER_FLUSH_MODEL {
   /*
diff --git a/src/query/src/qExtbuffer.c b/src/query/src/qExtbuffer.c
index 21b5361acba93c1345b4153ab4417dca9985285c..f11a16810c56603700e2edc3ce71e8dae874e442 100644
--- a/src/query/src/qExtbuffer.c
+++ b/src/query/src/qExtbuffer.c
@@ -12,15 +12,14 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
-#include "qExtbuffer.h"
 #include "os.h"
+#include "qExtbuffer.h"
 #include "queryLog.h"
 #include "taos.h"
 #include "taosdef.h"
 #include "taosmsg.h"
 #include "tsqlfunction.h"
 #include "tulog.h"
-#include "tutil.h"
 
 #define COLMODEL_GET_VAL(data, schema, allrow, rowId, colId) \
   (data + (schema)->pFields[colId].offset * (allrow) + (rowId) * (schema)->pFields[colId].field.bytes)