Do some memory tests. Use go test -run ‘’ to experiment with some settings

gosl_test.go

@@ -0,0 +1,21 @@
+package main
+
+import "os"
+import "testing"
+import "github.com/dgraph-io/badger/y"
+
+var Size int64 = 256 * 1024 * 1024
+
+func TestMmap(t *testing.T) {
+	t.Log("Trying mmap")
+	flags := os.O_RDWR | os.O_CREATE | os.O_EXCL
+	f, err := os.OpenFile("test.md", flags, 0666)
+	defer f.Close()
+	y.Check(err)
+//	size := int64(256 * 1024 * 1024)
+	t.Logf("Size is : %v", Size)
+	_, err = y.Mmap(f,false,Size)
+	if err != nil {
+		t.Errorf("mmap failed with error: %v", err)
+	}
+}