diff --git a/contrib/benchmark/CHANGES.txt b/contrib/benchmark/CHANGES.txt
index 4622711b908..6773a58fa50 100644
--- a/contrib/benchmark/CHANGES.txt
+++ b/contrib/benchmark/CHANGES.txt
@@ -4,6 +4,9 @@ The Benchmark contrib package contains code for benchmarking Lucene in a variety
 
 $Id:$
 
+12/16/08
+  LUCENE-1492: Added optional readOnly param (default true) to OpenReader task.
+
 9/9/08
  LUCENE-1243: Added new sorting benchmark capabilities.  Also Reopen and commit tasks.  (Mark Miller via Grant Ingersoll)
 
diff --git a/contrib/benchmark/src/java/org/apache/lucene/benchmark/byTask/tasks/OpenReaderTask.java b/contrib/benchmark/src/java/org/apache/lucene/benchmark/byTask/tasks/OpenReaderTask.java
index fcef25ea91c..1f0c84823e2 100644
--- a/contrib/benchmark/src/java/org/apache/lucene/benchmark/byTask/tasks/OpenReaderTask.java
+++ b/contrib/benchmark/src/java/org/apache/lucene/benchmark/byTask/tasks/OpenReaderTask.java
@@ -29,15 +29,25 @@ import org.apache.lucene.store.Directory;
  */
 public class OpenReaderTask extends PerfTask {
 
+  private boolean readOnly = true;
+
   public OpenReaderTask(PerfRunData runData) {
     super(runData);
   }
 
   public int doLogic() throws IOException {
     Directory dir = getRunData().getDirectory();
-    IndexReader reader = IndexReader.open(dir);
+    IndexReader reader = IndexReader.open(dir, readOnly);
     getRunData().setIndexReader(reader);
     return 1;
   }
 
+  public void setParams(String params) {
+    super.setParams(params);
+    readOnly = Boolean.valueOf(params).booleanValue();
+  }
+
+  public boolean supportsParams() {
+    return true;
+  }
 }
diff --git a/contrib/benchmark/src/test/org/apache/lucene/benchmark/byTask/TestPerfTasksLogic.java b/contrib/benchmark/src/test/org/apache/lucene/benchmark/byTask/TestPerfTasksLogic.java
index a3f31b22691..a311c4fe339 100755
--- a/contrib/benchmark/src/test/org/apache/lucene/benchmark/byTask/TestPerfTasksLogic.java
+++ b/contrib/benchmark/src/test/org/apache/lucene/benchmark/byTask/TestPerfTasksLogic.java
@@ -109,7 +109,7 @@ public class TestPerfTasksLogic extends TestCase {
         "{ AddDoc } : 1000",
         "Optimize",
         "CloseIndex",
-        "OpenReader",
+        "OpenReader(true)",
         "{ CountingHighlighterTest(size[1],highlight[1],mergeContiguous[true],maxFrags[1],fields[body]) } : 200",
         "CloseReader",
     };
@@ -147,7 +147,7 @@ public class TestPerfTasksLogic extends TestCase {
         "{ AddDoc } : 1000",
         "Optimize",
         "CloseIndex",
-        "OpenReader",
+        "OpenReader(false)",
         "{ CountingHighlighterTest(size[1],highlight[1],mergeContiguous[true],maxFrags[1],fields[body]) } : 200",
         "CloseReader",
     };