diff --git a/source/tools/monitor/unity/collector/container/cg_pmu_events_ffi/cg_pmu_ffi.c b/source/tools/monitor/unity/collector/container/cg_pmu_events_ffi/cg_pmu_ffi.c
index 5e9df82ec568a71784f3763ee5ef2f9ae465c3e9..e535b457c8d6b6356a9ebc947e2924c321dd6169 100644
--- a/source/tools/monitor/unity/collector/container/cg_pmu_events_ffi/cg_pmu_ffi.c
+++ b/source/tools/monitor/unity/collector/container/cg_pmu_events_ffi/cg_pmu_ffi.c
@@ -118,9 +118,14 @@ int collect_events(struct pcpu_hwi *hwi, int nr_cpus, double *sum)
 
 	for (i = 0; i < nr_cpus; i++) {
 		n = collect_pcpu_events(&hwi[i], sum);
-		if (n < 0)
+		if (n < 0) {
 			printf("collect_pcpu_events cpu%d fail:%s\n", i, strerror(-n));
+			break;
+		}
 	}
+	if (n < 0)
+		return n;
+	return 0;
 }
 
 int stop_events(struct pcpu_hwi *hwi, int nr_cpus)
diff --git a/source/tools/monitor/unity/collector/podMan/podFilter.lua b/source/tools/monitor/unity/collector/podMan/podFilter.lua
index 65a7410e6749bc336b7f85a785adfc40dc074ff4..9b0ebdbbbe000c67630d437b2fec420902a3781f 100644
--- a/source/tools/monitor/unity/collector/podMan/podFilter.lua
+++ b/source/tools/monitor/unity/collector/podMan/podFilter.lua
@@ -157,11 +157,9 @@ function CpodFilter:proc(elapsed, lines)
         print("cgroup changed.")
         local start = lua_local_clock()
         self._ino = Cinotifies.new()
-	for i, plugin in ipairs(self._plugins) do
-		pcall(plugin._del_, plugin)
-	end
         self._dirs = self:walkTops1(self._resYaml.container)
         self._plugins = setupPlugins(self._resYaml, self._proto, self._pffi, self._mnt, self._dirs)
+        collectgarbage("collect")
         local stop = lua_local_clock()
         ret, delta = 1, stop - start
 	return ret,delta