Update documentation to include recommendations for SWAP (#1883)

modules/ROOT/pages/performance/memory-configuration.adoc

@@ -11,10 +11,15 @@ image::neo4j-memory-management.svg[title="Neo4j memory management", role="middle
 *OS memory*::
 Some memory must be reserved for running the processes of the operating system itself.
 It is not possible to explicitly configure the amount of RAM that should be reserved for the operating system, as this is what RAM remains available after configuring Neo4j.
-If you do not leave enough space for the OS, it will start to swap memory to disk, which will heavily affect performance.
 +
 1GB is a good starting point for a server that is dedicated to running Neo4j.
 However, there are cases where the amount reserved for the OS is significantly larger than 1GB, such as servers with exceptionally large RAM.
++
+[NOTE]
+====
+If you do not leave enough space for the OS, it will start to swap memory to disk, which will heavily affect performance.
+Therefore, it is generally recommended to have swap turned off for a Neo4j dedicated server.
+====
 
 *JVM Heap*::
 The JVM heap is a separate dynamic memory allocation that Neo4j uses to store instantiated Java objects.