diff --git a/kernel/go.mod b/kernel/go.mod
index 57c95d65f..09d0831b1 100644
--- a/kernel/go.mod
+++ b/kernel/go.mod
@@ -45,7 +45,7 @@ require (
 	github.com/radovskyb/watcher v1.0.7
 	github.com/sashabaranov/go-openai v1.9.5
 	github.com/shirou/gopsutil/v3 v3.23.5
-	github.com/siyuan-note/dejavu v0.0.0-20230618092943-fe33c41abaa1
+	github.com/siyuan-note/dejavu v0.0.0-20230619030559-5961f5305454
 	github.com/siyuan-note/encryption v0.0.0-20220713091850-5ecd92177b75
 	github.com/siyuan-note/eventbus v0.0.0-20230216103454-41885eac6c2b
 	github.com/siyuan-note/filelock v0.0.0-20230615140405-d05a21d49524
diff --git a/kernel/go.sum b/kernel/go.sum
index 4872bf3e6..a6b324806 100644
--- a/kernel/go.sum
+++ b/kernel/go.sum
@@ -287,10 +287,8 @@ github.com/shopspring/decimal v1.3.1 h1:2Usl1nmF/WZucqkFZhnfFYxxxu8LG21F6nPQBE5g
 github.com/shopspring/decimal v1.3.1/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFRcu2hWCYk4o=
 github.com/shurcooL/gofontwoff v0.0.0-20181114050219-180f79e6909d h1:lvCTyBbr36+tqMccdGMwuEU+hjux/zL6xSmf5S9ITaA=
 github.com/shurcooL/gofontwoff v0.0.0-20181114050219-180f79e6909d/go.mod h1:05UtEgK5zq39gLST6uB0cf3NEHjETfB4Fgr3Gx5R9Vw=
-github.com/siyuan-note/dejavu v0.0.0-20230618031119-aeed7720d9d2 h1:kDKHzaEh9vFd2sedr3Aax20BcExVQ7rGA4XFKvW7F5E=
-github.com/siyuan-note/dejavu v0.0.0-20230618031119-aeed7720d9d2/go.mod h1:jdDdFYod0VEjslXFDpSge1WNIUSzdv5WYIoOVQFF/SE=
-github.com/siyuan-note/dejavu v0.0.0-20230618092943-fe33c41abaa1 h1:bqcXKbUXxoY7ggBGjvjFBI/Xbqervx4HYaVLEnRg6jk=
-github.com/siyuan-note/dejavu v0.0.0-20230618092943-fe33c41abaa1/go.mod h1:nvz7SnKTGUJ4bGjTx65rzEMdOrD0kZmRMZ6Bjv6Lj1Y=
+github.com/siyuan-note/dejavu v0.0.0-20230619030559-5961f5305454 h1:d5etRsdJvV5DbGSbelJ0ZZH0eFHcKQliE0TgrNc2ngU=
+github.com/siyuan-note/dejavu v0.0.0-20230619030559-5961f5305454/go.mod h1:nvz7SnKTGUJ4bGjTx65rzEMdOrD0kZmRMZ6Bjv6Lj1Y=
 github.com/siyuan-note/encryption v0.0.0-20220713091850-5ecd92177b75 h1:Bi7/7f29LW+Fm0cHc0J1NO1cZqyJwljSWVmfOqVZgaE=
 github.com/siyuan-note/encryption v0.0.0-20220713091850-5ecd92177b75/go.mod h1:H8fyqqAbp9XreANjeSbc72zEdFfKTXYN34tc1TjZwtw=
 github.com/siyuan-note/eventbus v0.0.0-20230216103454-41885eac6c2b h1:828lTUW2C0uNiolODqoACu7J8sDUzswD4Xo04mUombg=
diff --git a/kernel/treenode/blocktree.go b/kernel/treenode/blocktree.go
index a3b8a8f49..0b904076c 100644
--- a/kernel/treenode/blocktree.go
+++ b/kernel/treenode/blocktree.go
@@ -19,7 +19,6 @@ package treenode
 import (
 	"os"
 	"path/filepath"
-	"runtime/debug"
 	"strings"
 	"sync"
 	"time"
@@ -443,7 +442,6 @@ func InitBlockTree(force bool) {
 	waitGroup.Wait()
 	p.Release()
 
-	debug.FreeOSMemory()
 	elapsed := time.Since(start).Seconds()
 	logging.LogInfof("read block tree [%s] to [%s], elapsed [%.2fs]", humanize.Bytes(uint64(size)), util.BlockTreePath, elapsed)
 	return