Update README.md

README.md

@@ -10,7 +10,7 @@ After downloading the sources, run the task `mvn package`.
 
 Use the elasticsearch plugin manager to install the plugin :
 
-    $ /path-to/elasticsearch/bin/plugin -url file:./target/release/elasticsearch-river-subversion-0.2.0.zip -install river-subversion
+    $ /path-to/elasticsearch/bin/plugin -url file:./target/release/elasticsearch-river-subversion-0.2.1.zip -install river-subversion
 
 ### Creating a Subversion river ###
 Just create a new river of type "svn" and give it at least a repository (only local file at the moment) and a path to index ("/" for the entire repos) :
@@ -26,8 +26,13 @@ Just create a new river of type "svn" and give it at least a repository (only lo
 ### Data indexed ###
 For the moment the river indexes only a few metadatas from svn, mainly the file content (I wrote it for full-text searches) :
 **path**, **name**, **author**, **repository**, **revision**, **date**, **size**, **message** and **content**.
+
+Fields **from** and **origin** are respectively the revision and path of origin of the change, like when a tag is created from the trunk.
+
 Please be aware that the mapping did change from the previous version, as the indexing of revisions is now preferred to the indexing of single documents.
 
+### Performance ###
+Be very careful not to be too greedy with the bulk size and update rate parameters, as the retrieving of revisions can have a high memory consumption, and the indexing itself is very CPU-intensive.
 
 ## Credits ##