diff --git a/kernel/sql/queue.go b/kernel/sql/queue.go
index 88bffb347..1b8e5f6db 100644
--- a/kernel/sql/queue.go
+++ b/kernel/sql/queue.go
@@ -21,6 +21,7 @@ import (
 	"errors"
 	"fmt"
 	"path"
+	"runtime"
 	"sync"
 	"time"
 
@@ -125,6 +126,10 @@ func FlushQueue() {
 			logging.LogErrorf("commit tx failed: %s", err)
 			return
 		}
+
+		if 16 < i && 0 == i%256 {
+			runtime.GC()
+		}
 	}
 
 	elapsed := time.Now().Sub(start).Milliseconds()