diff --git a/src/main/java/com/google/gerrit/elasticsearch/AbstractElasticIndex.java b/src/main/java/com/google/gerrit/elasticsearch/AbstractElasticIndex.java
index fce86b9..482868c 100644
--- a/src/main/java/com/google/gerrit/elasticsearch/AbstractElasticIndex.java
+++ b/src/main/java/com/google/gerrit/elasticsearch/AbstractElasticIndex.java
@@ -52,6 +52,8 @@
 import com.google.gerrit.server.config.SitePaths;
 import com.google.gerrit.server.index.IndexUtils;
 import com.google.gerrit.server.index.options.AutoFlush;
+import com.google.gerrit.server.logging.Metadata;
+import com.google.gerrit.server.logging.TraceContext;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import com.google.gson.JsonArray;
@@ -282,7 +284,11 @@
           String.format("Expected %s, but was: %s", ContentType.APPLICATION_JSON, contentType));
       String responseStr = EntityUtils.toString(response.getEntity());
       JsonObject responseJson = (JsonObject) new JsonParser().parse(responseStr);
-      return responseJson.get("errors").getAsBoolean();
+      boolean hasErrors = responseJson.get("errors").getAsBoolean();
+      if (hasErrors) {
+        logger.atSevere().log("Response with errors: %s", responseJson);
+      }
+      return hasErrors;
     } catch (IOException e) {
       throw new StorageException(e);
     }
@@ -354,7 +360,15 @@
     for (Map.Entry<String, String> entry : params.entrySet()) {
       request.addParameter(entry.getKey(), entry.getValue());
     }
-    try {
+    try (TraceContext.TraceTimer traceTimer =
+        TraceContext.newTimer(
+            "Elasticsearch perform request",
+            Metadata.builder()
+                .indexName(indexName)
+                .operationName(
+                    String.format(
+                        "method:%s uri:%s payload:%s params:%s", method, uri, payload, params))
+                .build())) {
       return client.get().performRequest(request);
     } catch (IOException e) {
       throw new StorageException(e);
diff --git a/src/main/resources/Documentation/config.md b/src/main/resources/Documentation/config.md
index 1954cb0..5d0dead 100644
--- a/src/main/resources/Documentation/config.md
+++ b/src/main/resources/Documentation/config.md
@@ -22,8 +22,7 @@
 
 ## Section elasticsearch
 
-WARNING: Support for Elasticsearch is still experimental and is not recommended for production
-use. For compatibility information, please refer to the [project homepage](https://www.gerritcodereview.com/elasticsearch.html).
+For compatibility information, please refer to the [project homepage](https://www.gerritcodereview.com/elasticsearch.html).
 
 Note that when Gerrit is configured to use Elasticsearch, the Elasticsearch
 server(s) must be reachable during the site initialization.