Index: src/java/org/apache/lucene/index/LogDocMergePolicy.java
===================================================================
--- src/java/org/apache/lucene/index/LogDocMergePolicy.java	(revision 773951)
+++ src/java/org/apache/lucene/index/LogDocMergePolicy.java	(working copy)
@@ -1,5 +1,7 @@
 package org.apache.lucene.index;
 
+import java.io.IOException;
+
 /**
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
@@ -34,8 +36,8 @@
     // it to Long.MAX_VALUE to disable it
     maxMergeSize = Long.MAX_VALUE;
   }
-  protected long size(SegmentInfo info) {
-    return info.docCount;
+  protected long size(SegmentInfo info) throws IOException {
+    return info.docCount - (long)info.getDelCount();
   }
 
   /** Sets the minimum size for the lowest level segments.
Index: src/java/org/apache/lucene/index/LogMergePolicy.java
===================================================================
--- src/java/org/apache/lucene/index/LogMergePolicy.java	(revision 773951)
+++ src/java/org/apache/lucene/index/LogMergePolicy.java	(working copy)
@@ -390,7 +390,7 @@
         boolean anyTooLarge = false;
         for(int i=start;i<end;i++) {
           final SegmentInfo info = infos.info(i);
-          anyTooLarge |= (size(info) >= maxMergeSize || info.docCount >= maxMergeDocs);
+          anyTooLarge |= (size(info) >= maxMergeSize || (info.docCount - info.getDelCount()) >= maxMergeDocs);
         }
 
         if (!anyTooLarge) {
Index: src/java/org/apache/lucene/index/LogByteSizeMergePolicy.java
===================================================================
--- src/java/org/apache/lucene/index/LogByteSizeMergePolicy.java	(revision 773951)
+++ src/java/org/apache/lucene/index/LogByteSizeMergePolicy.java	(working copy)
@@ -36,7 +36,9 @@
     maxMergeSize = (long) (DEFAULT_MAX_MERGE_MB*1024*1024);
   }
   protected long size(SegmentInfo info) throws IOException {
-    return info.sizeInBytes();
+    long byteSize = info.sizeInBytes();
+    float delRatio = (info.docCount <= 0 ? 0.0f : ((float)info.getDelCount() / (float)info.docCount));
+    return (info.docCount <= 0 ?  byteSize : (long)((float)byteSize * (1.0f - delRatio)));
   }
 
   /** <p>Determines the largest segment (measured by total