[Docs] Added info about the memory working set showed by the task manager.

msvs/setups/documentation/redis.windows-service.conf

@@ -453,6 +453,18 @@ slave-priority 100
 # WARNING: not setting maxmemory will cause Redis to terminate with an
 # out-of-memory exception if the heap limit is reached.
 #
+# NOTE: since Redis uses the system paging file to allocate the heap memory,
+# the Working Set memory usage showed by the Windows Task Manager or by other
+# tools such as ProcessExplorer will not always be accurate. For example, right
+# after a background save of the RDB or the AOF files, the working set value
+# may drop significantly. In order to check the correct amount of memory used
+# by the redis-server to store the data, use the INFO client command. The INFO
+# command shows only the memory used to store the redis data, not the extra
+# memory used by the Windows process for its own requirements. Th3 extra amount
+# of memory not reported by the INFO command can be calculated subtracting the
+# Peak Working Set reported by the Windows Task Manager and the used_memory_peak
+# reported by the INFO command.
+#
 # maxmemory <bytes>
 
 # MAXMEMORY POLICY: how Redis will select what to remove when maxmemory

msvs/setups/documentation/redis.windows.conf

@@ -453,6 +453,18 @@ slave-priority 100
 # WARNING: not setting maxmemory will cause Redis to terminate with an
 # out-of-memory exception if the heap limit is reached.
 #
+# NOTE: since Redis uses the system paging file to allocate the heap memory,
+# the Working Set memory usage showed by the Windows Task Manager or by other
+# tools such as ProcessExplorer will not always be accurate. For example, right
+# after a background save of the RDB or the AOF files, the working set value
+# may drop significantly. In order to check the correct amount of memory used
+# by the redis-server to store the data, use the INFO client command. The INFO
+# command shows only the memory used to store the redis data, not the extra
+# memory used by the Windows process for its own requirements. Th3 extra amount
+# of memory not reported by the INFO command can be calculated subtracting the
+# Peak Working Set reported by the Windows Task Manager and the used_memory_peak
+# reported by the INFO command.
+#
 # maxmemory <bytes>
 
 # MAXMEMORY POLICY: how Redis will select what to remove when maxmemory