diff --git a/benchmarks/src/main/java/org/elasticsearch/benchmark/index/LuceneChangesSnapshotBenchmark.java b/benchmarks/src/main/java/org/elasticsearch/benchmark/index/LuceneChangesSnapshotBenchmark.java
index 211e9f223f2a8..070f4ecc06e39 100644
--- a/benchmarks/src/main/java/org/elasticsearch/benchmark/index/LuceneChangesSnapshotBenchmark.java
+++ b/benchmarks/src/main/java/org/elasticsearch/benchmark/index/LuceneChangesSnapshotBenchmark.java
@@ -22,6 +22,7 @@
 import org.elasticsearch.common.bytes.BytesReference;
 import org.elasticsearch.common.io.Streams;
 import org.elasticsearch.common.logging.LogConfigurator;
+import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.util.BigArrays;
 import org.elasticsearch.core.IOUtils;
 import org.elasticsearch.index.IndexVersion;
@@ -66,8 +67,8 @@
 @OutputTimeUnit(TimeUnit.MILLISECONDS)
 @State(Scope.Thread)
 public class LuceneChangesSnapshotBenchmark {
-    @Param({ "synthetic", "stored" })
-    String sourceMode;
+    @Param({ "default", "logsdb" })
+    String indexMode;
 
     @Param({ "true", "false" })
     boolean sequential;
@@ -88,7 +89,8 @@ public class LuceneChangesSnapshotBenchmark {
     public void setup() throws IOException {
         this.path = Files.createTempDirectory("snapshot_changes");
 
-        this.mapperService = MapperServiceFactory.create(readMappings(sourceMode));
+        Settings settings = indexMode.equals("logsdb") ? Settings.builder().put("index.mode", "logsdb").build() : Settings.EMPTY;
+        this.mapperService = MapperServiceFactory.create(settings, readMappings());
         IndexWriterConfig config = new IndexWriterConfig();
         config.setCodec(
             new PerFieldMapperCodec(Zstd814StoredFieldsFormat.Mode.BEST_COMPRESSION, mapperService, BigArrays.NON_RECYCLING_INSTANCE)
@@ -186,10 +188,8 @@ public long recover() throws IOException {
         return totalSize;
     }
 
-    private String readMappings(String mode) throws IOException {
-        return Streams.readFully(LuceneChangesSnapshotBenchmark.class.getResourceAsStream("lucene-changes-mappings.json"))
-            .utf8ToString()
-            .replace("$1", mode);
+    private String readMappings() throws IOException {
+        return Streams.readFully(LuceneChangesSnapshotBenchmark.class.getResourceAsStream("lucene-changes-mappings.json")).utf8ToString();
     }
 
     private InputStream readSampleDocs() throws IOException {
diff --git a/benchmarks/src/main/java/org/elasticsearch/benchmark/index/mapper/MapperServiceFactory.java b/benchmarks/src/main/java/org/elasticsearch/benchmark/index/mapper/MapperServiceFactory.java
index d3f210f774782..524576018f376 100644
--- a/benchmarks/src/main/java/org/elasticsearch/benchmark/index/mapper/MapperServiceFactory.java
+++ b/benchmarks/src/main/java/org/elasticsearch/benchmark/index/mapper/MapperServiceFactory.java
@@ -43,9 +43,13 @@
 import java.util.Map;
 
 public class MapperServiceFactory {
-
     public static MapperService create(String mappings) {
+        return create(Settings.EMPTY, mappings);
+    }
+
+    public static MapperService create(Settings userSettings, String mappings) {
         Settings settings = Settings.builder()
+            .put(userSettings)
             .put("index.number_of_replicas", 0)
             .put("index.number_of_shards", 1)
             .put(IndexMetadata.SETTING_VERSION_CREATED, IndexVersion.current())
diff --git a/benchmarks/src/main/resources/org/elasticsearch/benchmark/index/lucene-changes-mappings.json b/benchmarks/src/main/resources/org/elasticsearch/benchmark/index/lucene-changes-mappings.json
index 97928dff318eb..217bc64761bd5 100644
--- a/benchmarks/src/main/resources/org/elasticsearch/benchmark/index/lucene-changes-mappings.json
+++ b/benchmarks/src/main/resources/org/elasticsearch/benchmark/index/lucene-changes-mappings.json
@@ -9,9 +9,6 @@
   "_data_stream_timestamp": {
     "enabled": true
   },
-  "_source": {
-    "mode": "$1"
-  },
   "date_detection": false,
   "runtime": {
     "rally.doc_size": {