Merge pull request #16875 from peschlowp/patch-7

Update configuration.asciidoc

docs/reference/setup/configuration.asciidoc

@@ -299,8 +299,8 @@ is used in the settings and the process is run as a service or in the background
 === Index Settings
 
 Indices created within the cluster can provide their own settings. For
-example, the following creates an index with memory based storage
-instead of the default file system based one (the format can be either
+example, the following creates an index with a refresh interval of 5
+seconds instead of the default refresh interval (the format can be either
 YAML or JSON):
 
 [source,sh]
@@ -322,10 +322,10 @@ index :
 --------------------------------------------------
 
 This means that every index that gets created on the specific node
-started with the mentioned configuration will store the index in memory
-*unless the index explicitly sets it*. In other words, any index level
-settings override what is set in the node configuration. Of course, the
-above can also be set as a "collapsed" setting, for example:
+started with the mentioned configuration will use a refresh interval of
+5 seconds *unless the index explicitly sets it*. In other words, any
+index level settings override what is set in the node configuration. Of
+course, the above can also be set as a "collapsed" setting, for example:
 
 [source,sh]
 --------------------------------------------------