Close content gap for ignore_above mapping parameter

_field-types/mapping-parameters/ignore-above.md

@@ -0,0 +1,36 @@
+---
+layout: default
+title: ignore_above 
+parent: Mapping parameters
+grand_parent: Mapping and field types
+nav_order: 60
+has_children: false
+has_toc: false
+---
+
+# Ignore_above
+
+The `ignore_above` parameter is a powerful tool in OpenSearch for managing the indexing of long string values. When applied to a field, it sets a character limit for indexing. This feature is particularly useful for optimizing index size and preventing potential issues with extremely long terms.
+
+String values exceeding the `ignore_above` limit will not be indexed or stored. For arrays of strings, `ignore_above` is applied to each element individually. All original values remain in the `_source` field, if enabled.
+
+---
+
+## Example: Ignoring character
+
+The following example request creates an index with a message field that sets `ignore_above` to 20 characters:
+
+```json
+PUT my-index
+{
+  "mappings": {
+    "properties": {
+      "message": {
+        "type": "keyword",
+        "ignore_above": 20
+      }
+    }
+  }
+}
+```
+{% include copy-curl.html %}