diff --git a/tap/passive_tapper.go b/tap/passive_tapper.go
index d4aec99f3..2930cf284 100644
--- a/tap/passive_tapper.go
+++ b/tap/passive_tapper.go
@@ -18,6 +18,7 @@ import (
 	"os"
 	"os/signal"
 	"runtime"
+	_debug "runtime/debug"
 	"runtime/pprof"
 	"strconv"
 	"strings"
@@ -218,6 +219,7 @@ func closeTimedoutTcpStreamChannels() {
 	maxNumberOfGoroutines = GetMaxNumberOfGoroutines()
 	TcpStreamChannelTimeoutMs := GetTcpChannelTimeoutMs()
 	for {
+		_debug.FreeOSMemory()
 		time.Sleep(10 * time.Millisecond)
 		streams.Range(func(key interface{}, value interface{}) bool {
 			streamWrapper := value.(*tcpStreamWrapper)