Index: src/test/org/apache/lucene/util/TestSortedVIntList.java
===================================================================
--- src/test/org/apache/lucene/util/TestSortedVIntList.java	(revision 901183)
+++ src/test/org/apache/lucene/util/TestSortedVIntList.java	(working copy)
@@ -193,4 +193,11 @@
   public void test12() {
    tstIllegalArgExc(new int[] {0,1,1,2,3,5,8,0});
   }
+  public void test13Allocation() throws Exception {
+    int [] a = new int[2000]; // SortedVIntList initial byte size is 128
+    for (int i = 0; i < a.length; i++) {
+      a[i] = (107 + i) * i;
+    }
+    tstIterator(new SortedVIntList(a), a);
+  }
 }
Index: src/java/org/apache/lucene/store/IndexInput.java
===================================================================
--- src/java/org/apache/lucene/store/IndexInput.java	(revision 901183)
+++ src/java/org/apache/lucene/store/IndexInput.java	(working copy)
@@ -21,6 +21,7 @@
 import java.io.Closeable;
 import java.util.Map;
 import java.util.HashMap;
+import org.apache.lucene.util.ArrayUtil;
 
 /** Abstract base class for input from a file in a {@link Directory}.  A
  * random-access input stream.  Used for all Lucene index input operations.
@@ -122,16 +123,18 @@
     if (preUTF8Strings)
       return readModifiedUTF8String();
     int length = readVInt();
-    if (bytes == null || length > bytes.length)
-      bytes = new byte[(int) (length*1.25)];
+    if (bytes == null || length > bytes.length) {
+      bytes = new byte[ArrayUtil.getNextSize(length)];
+    }
     readBytes(bytes, 0, length);
     return new String(bytes, 0, length, "UTF-8");
   }
 
   private String readModifiedUTF8String() throws IOException {
     int length = readVInt();
-    if (chars == null || length > chars.length)
-      chars = new char[length];
+    if (chars == null || length > chars.length) {
+      chars = new char[ArrayUtil.getNextSize(length)];
+    }
     readChars(chars, 0, length);
     return new String(chars, 0, length);
   }
@@ -157,10 +160,11 @@
       else if ((b & 0xE0) != 0xE0) {
 	buffer[i] = (char)(((b & 0x1F) << 6)
 		 | (readByte() & 0x3F));
-      } else
+      } else {
 	buffer[i] = (char)(((b & 0x0F) << 12)
 		| ((readByte() & 0x3F) << 6)
 	        |  (readByte() & 0x3F));
+      }
     }
   }
 
@@ -181,10 +185,9 @@
       byte b = readByte();
       if ((b & 0x80) == 0){
         //do nothing, we only need one byte
-      }
-      else if ((b & 0xE0) != 0xE0) {
+      } else if ((b & 0xE0) != 0xE0) {
         readByte();//read an additional byte
-      } else{      
+      } else {      
         //read two additional bytes.
         readByte();
         readByte();
Index: src/java/org/apache/lucene/util/SortedVIntList.java
===================================================================
--- src/java/org/apache/lucene/util/SortedVIntList.java	(revision 901183)
+++ src/java/org/apache/lucene/util/SortedVIntList.java	(working copy)
@@ -128,8 +128,8 @@
       }
   
       if ((lastBytePos + MAX_BYTES_PER_INT) > bytes.length) {
-        // biggest possible int does not fit
-        resizeBytes((bytes.length * 2) + MAX_BYTES_PER_INT);
+        // Biggest possible int does not fit.
+        resizeBytes(ArrayUtil.getNextSize(lastBytePos + MAX_BYTES_PER_INT));
       }
   
       // See org.apache.lucene.store.IndexOutput.writeVInt()