diff --git a/src/main/java/com/searchscale/lucene/cuvs/benchmarks/BenchmarkConfiguration.java b/src/main/java/com/searchscale/lucene/cuvs/benchmarks/BenchmarkConfiguration.java
index d1d3c80..37df685 100644
--- a/src/main/java/com/searchscale/lucene/cuvs/benchmarks/BenchmarkConfiguration.java
+++ b/src/main/java/com/searchscale/lucene/cuvs/benchmarks/BenchmarkConfiguration.java
@@ -27,6 +27,7 @@ public class BenchmarkConfiguration {
   public String hnswIndexDirPath;
   public boolean loadVectorsInMemory;
   public boolean skipIndexing;
+  public boolean forceMerge;
 
   // Lucene HNSW parameters
   public int hnswMaxConn;               // 16 default (max 512)
@@ -79,7 +80,8 @@ public String prettyString() {
     if (hnswIndexDirPath != null) sb.append("HNSW index directory path is: ").append(hnswIndexDirPath).append('\n');
     sb.append("Load vectors in memory before indexing: ").append(loadVectorsInMemory).append('\n');
     sb.append("Skip indexing (and use existing index for search): ").append(skipIndexing).append('\n');
-
+    sb.append("Do force merge while indexing documents: ").append(forceMerge).append('\n');
+    
     sb.append("------- algo parameters ------\n");
     if (isLucene()) {
       sb.append("hnswMaxConn: ").append(hnswMaxConn).append('\n');
diff --git a/src/main/java/com/searchscale/lucene/cuvs/benchmarks/LuceneCuvsBenchmarks.java b/src/main/java/com/searchscale/lucene/cuvs/benchmarks/LuceneCuvsBenchmarks.java
index 072a112..ab6f478 100644
--- a/src/main/java/com/searchscale/lucene/cuvs/benchmarks/LuceneCuvsBenchmarks.java
+++ b/src/main/java/com/searchscale/lucene/cuvs/benchmarks/LuceneCuvsBenchmarks.java
@@ -441,6 +441,11 @@ private static void indexDocuments(IndexWriter writer, BenchmarkConfiguration co
     pool.shutdown();
     pool.awaitTermination(Long.MAX_VALUE, TimeUnit.SECONDS);
 
+    if (config.forceMerge) {
+    	log.info("Force merge is enabled.");
+    	writer.forceMerge(1);
+    }
+    
     // log.info("Calling forceMerge(1).");
     // writer.forceMerge(1);
     log.info("Calling commit.");