Document usage scope and effects of Meta annotation.

Original pull request #4854
See #4852

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/Meta.java

@@ -24,6 +24,12 @@ import java.lang.annotation.Target;
 import org.springframework.data.annotation.QueryAnnotation;
 
 /**
+ * Annotation to declare meta-information (execution time, cursor size, disk usage) for query methods.
+ * <p>
+ * Annotating a repository method with this annotation forces the method to be implemented as query method (i.e. using
+ * this annotation on an overridden method from a base interface or fragment interface), similar to using
+ * {@link Query @Query}.
+ *
  * @author Christoph Strobl
  * @author Mark Paluch
  * @since 1.6

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/Near.java

@@ -25,8 +25,8 @@ import org.springframework.data.geo.Distance;
 import org.springframework.data.geo.Point;
 
 /**
- * Annotation to be used for disambiguing method parameters that shall be used to trigger geo near queries. By default
+ * Annotation to be used for disambiguating method parameters that shall be used to trigger geo near queries. By
- * those parameters are found without the need for additional annotation if they are the only parameters of the
+ * default, those parameters are found without the need for additional annotation if they are the only parameters of the
  * according type (e.g. {@link Point}, {@code double[]}, {@link Distance}).
  *
  * @author Oliver Gierke

src/main/antora/modules/ROOT/pages/mongodb/repositories/query-methods.adoc

@@ -205,6 +205,9 @@ lower / upper bounds (`$gt` / `$gte` & `$lt` / `$lte`) according to `Range`
 
 NOTE: If the property criterion compares a document, the order of the fields and exact equality in the document matters.
 
+NOTE: In some scenarios, you might require additional options, such as a maximum run time, additional log comments, or the permission to temporarily write data to disk.
+Use the `@Meta` annotation to set those options via `maxExecutionTimeMs`, `comment` or `allowDiskUse`. `@Meta` can only be used on repository query methods, not on base interface or fragment interface methods.
+
 [[mongodb.repositories.queries.geo-spatial]]
 == Geo-spatial Queries
 
@@ -443,7 +446,7 @@ public interface PersonRepository extends ReactiveMongoRepository<Person, String
 ======
 
 Expressions can be used to invoke functions, evaluate conditionals, and construct values.
-SpEL expressions used in conjunction with JSON reveal a side-effect, because Map-like declarations inside of SpEL read like JSON, as the following example shows:
+SpEL expressions used in conjunction with JSON reveal a side effect, because Map-like declarations inside of SpEL read like JSON, as the following example shows:
 
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