diff --git a/model/query_piece.go b/model/query_piece.go
index a99d446..1b2334f 100644
--- a/model/query_piece.go
+++ b/model/query_piece.go
@@ -1,8 +1,6 @@
 package model
 
 import (
-	"bytes"
-	"encoding/json"
 	jsoniter "github.com/json-iterator/go"
 	"github.com/pingcap/tidb/util/hack"
 	"time"
@@ -82,8 +80,8 @@ func (bqp *BaseQueryPiece) GetSQL() (*string) {
 func (bqp *BaseQueryPiece) Recovery() {
 }
 
+/**
 func marsharQueryPieceShareMemory(qp interface{}, cacheBuffer []byte) []byte {
-
 	buffer := bytes.NewBuffer(cacheBuffer)
 	err := json.NewEncoder(buffer).Encode(qp)
 	if err != nil {
@@ -92,6 +90,7 @@ func marsharQueryPieceShareMemory(qp interface{}, cacheBuffer []byte) []byte {
 
 	return buffer.Bytes()
 }
+*/
 
 func marsharQueryPieceMonopolize(qp interface{}) (content []byte) {
 	content, err := jsonIterator.Marshal(qp)
diff --git a/model/query_piece_pool.go b/model/query_piece_pool.go
index 7a58d67..358c29f 100644
--- a/model/query_piece_pool.go
+++ b/model/query_piece_pool.go
@@ -1,19 +1,13 @@
 package model
 
 import (
-	"github.com/zr-hebo/sniffer-agent/util"
 	"sync"
 	"time"
 )
 
-var (
-	localSliceBufferPool = util.NewSliceBufferPool("json cache", (128+1)*1024)
-)
-
 type PooledMysqlQueryPiece struct {
 	MysqlQueryPiece
 	recoverPool     *mysqlQueryPiecePool
-	sliceBufferPool *util.SliceBufferPool
 }
 
 func NewPooledMysqlQueryPiece(
@@ -22,7 +16,6 @@ func NewPooledMysqlQueryPiece(
 	pmqp *PooledMysqlQueryPiece) {
 	pmqp = mqpp.Dequeue()
 
-	pmqp.sliceBufferPool = localSliceBufferPool
 	nowInMS := time.Now().UnixNano() / millSecondUnit
 	pmqp.SessionID = sessionID
 	pmqp.ClientHost = clientIP
@@ -41,9 +34,6 @@ func NewPooledMysqlQueryPiece(
 }
 
 func (pmqp *PooledMysqlQueryPiece) Recovery() {
-	if pmqp.sliceBufferPool != nil {
-		pmqp.sliceBufferPool.Enqueue(pmqp.jsonContent[:0])
-	}
 	pmqp.jsonContent = nil
 	pmqp.recoverPool.Enqueue(pmqp)
 }
@@ -59,17 +49,7 @@ func (pmqp *PooledMysqlQueryPiece) Bytes() (content []byte) {
 }
 
 func (pmqp *PooledMysqlQueryPiece) GenerateJsonBytes() {
-	if pmqp.sliceBufferPool == nil {
-		pmqp.jsonContent = marsharQueryPieceMonopolize(pmqp)
-		return
-	}
-
-	var cacheBuffer = pmqp.sliceBufferPool.Dequeue()
-	if len(cacheBuffer) > 0 {
-		panic("there already have bytes in buffer")
-	}
-
-	pmqp.jsonContent = marsharQueryPieceShareMemory(pmqp, cacheBuffer)
+	pmqp.jsonContent = marsharQueryPieceMonopolize(pmqp)
 	return
 }