Use malloc_trim

free_memory_linux.go

@@ -0,0 +1,20 @@
+// +build linux
+
+package main
+
+/*
+#include <features.h>
+#ifdef __GLIBC__
+#include <malloc.h>
+#else
+void malloc_trim(size_t pad){}
+#endif
+*/
+import "C"
+import "runtime/debug"
+
+func freeMemory() {
+	debug.FreeOSMemory()
+
+	C.malloc_trim(0)
+}