DOCS-169 fixing error in index limits

Author: Sam Kleinman

aspiration/use-cases/cms-storing-comments.txt

@@ -113,10 +113,11 @@ This structure:
 
 .. warning::
 
-   MongoDB can only index :ref:`128 characters <limits-index-size>`
-   including field name and namespace (i.e. database name and
-   collection name.) This may become an issue when you create an index
-   of the ``full_slug`` field to support sorting.
+   MongoDB can only index :ref:`1024 bytes <limits-index-size>`. This
+   includes all field data, the field name, and the namespace
+   (i.e. database name and collection name.) This may become an issue
+   when you create an index of the ``full_slug`` field to support
+   sorting.
 
 Operations
 ~~~~~~~~~~

source/reference/limits.txt

@@ -23,8 +23,10 @@ Limits
 
 .. describe:: Index Size
 
-   Index names, including their namespace/database, can be *no larger*
-   than 128 characters.
+   Indexed items, including their namespace/database, can be *no
+   larger* than 1024 bytes. This limit includes the indexed content
+   (i.e. the field value,) the field name (i.e. the key,) and the
+   namespace (i.e. the database name and the collection name.)
 
 .. _limit-number-of-indexes-per-collection: