Index: lucene/core/src/java/org/apache/lucene/store/BufferedIndexOutput.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/store/BufferedIndexOutput.java	(revision 1457147)
+++ lucene/core/src/java/org/apache/lucene/store/BufferedIndexOutput.java	(working copy)
@@ -133,6 +133,12 @@
 
   @Override
   public abstract long length() throws IOException;
+  
+  /**
+   * Returns size of the used output buffer in bytes.
+   * */
+  public final int getBufferSize() {
+    return bufferSize;
+  }
 
-
 }