reorder sections

doc/sphinx/reference/vsl-query.rst

@@ -74,6 +74,20 @@ The grouping modes are:
   Every log record will make up a transaction of it's own. All data,
   including non-transactional data will be reported.
 
+Transaction Hierarchy
+---------------------
+
+Example transaction hierarchy using request grouping mode ::
+
+  Lvl 1: Client request (cache miss)
+    Lvl 2: Backend request
+    Lvl 2: ESI subrequest (cache miss)
+      Lvl 3: Backend request
+      Lvl 3: Backend request (VCL restart)
+      Lvl 3: ESI subrequest (cache miss)
+        Lvl 4: Backend request
+    Lvl 2: ESI subrequest (cache hit)
+
 Memory Usage
 ------------
 
@@ -96,17 +110,6 @@ grouping also logs (potentially long lasting) sessions, it is also
 likely to require memory for copies of log entries, but far less than
 session grouping.
 
-Example transaction hierarchy using request grouping mode ::
-
-  Lvl 1: Client request (cache miss)
-    Lvl 2: Backend request
-    Lvl 2: ESI subrequest (cache miss)
-      Lvl 3: Backend request
-      Lvl 3: Backend request (VCL restart)
-      Lvl 3: ESI subrequest (cache miss)
-        Lvl 4: Backend request
-    Lvl 2: ESI subrequest (cache hit)
-
 QUERY LANGUAGE
 ==============