diff --git a/agent/utils/common/sqlite.go b/agent/utils/common/sqlite.go
index 7f89d0295491..22eb8ec4515f 100644
--- a/agent/utils/common/sqlite.go
+++ b/agent/utils/common/sqlite.go
@@ -71,8 +71,9 @@ func GetDBWithPath(dbPath string) (*gorm.DB, error) {
 	if dbError != nil {
 		return nil, dbError
 	}
-	sqlDB.SetMaxOpenConns(1)
+	sqlDB.SetMaxOpenConns(4)
 	sqlDB.SetMaxIdleConns(1)
+	sqlDB.SetConnMaxIdleTime(15 * time.Minute)
 	sqlDB.SetConnMaxLifetime(time.Hour)
 	return db, nil
 }
diff --git a/core/init/session/psession/psession.go b/core/init/session/psession/psession.go
index e18f91b652a3..875652d1f738 100644
--- a/core/init/session/psession/psession.go
+++ b/core/init/session/psession/psession.go
@@ -48,8 +48,9 @@ func NewPSession(dbPath string) *PSession {
 	if dbError != nil {
 		panic(err)
 	}
-	sqlDB.SetMaxOpenConns(1)
+	sqlDB.SetMaxOpenConns(4)
 	sqlDB.SetMaxIdleConns(1)
+	sqlDB.SetConnMaxIdleTime(15 * time.Minute)
 	sqlDB.SetConnMaxLifetime(time.Hour)
 
 	store := gormstore.New(db, securecookie.GenerateRandomKey(32))
diff --git a/core/middleware/operation.go b/core/middleware/operation.go
index 605cd285e96e..58495fda86af 100644
--- a/core/middleware/operation.go
+++ b/core/middleware/operation.go
@@ -233,8 +233,9 @@ func newDB(pathItem string) (*gorm.DB, error) {
 	if err != nil {
 		return nil, err
 	}
-	sqlDB.SetMaxOpenConns(1)
+	sqlDB.SetMaxOpenConns(4)
 	sqlDB.SetMaxIdleConns(1)
+	sqlDB.SetConnMaxIdleTime(15 * time.Minute)
 	sqlDB.SetConnMaxLifetime(time.Hour)
 	return db, nil
 }
diff --git a/core/utils/common/sqlite.go b/core/utils/common/sqlite.go
index c809456e2d2b..3922ad6ef2b8 100644
--- a/core/utils/common/sqlite.go
+++ b/core/utils/common/sqlite.go
@@ -67,8 +67,9 @@ func GetDBWithPath(dbPath string) (*gorm.DB, error) {
 	if dbError != nil {
 		return nil, dbError
 	}
-	sqlDB.SetMaxOpenConns(1)
+	sqlDB.SetMaxOpenConns(4)
 	sqlDB.SetMaxIdleConns(1)
+	sqlDB.SetConnMaxIdleTime(15 * time.Minute)
 	sqlDB.SetConnMaxLifetime(time.Hour)
 	return db, nil
 }