diff --git a/solr/core/src/java/org/apache/solr/metrics/prometheus/core/SolrCoreIndexMetric.java b/solr/core/src/java/org/apache/solr/metrics/prometheus/core/SolrCoreIndexMetric.java
index e45e1e955bd..106c7f42821 100644
--- a/solr/core/src/java/org/apache/solr/metrics/prometheus/core/SolrCoreIndexMetric.java
+++ b/solr/core/src/java/org/apache/solr/metrics/prometheus/core/SolrCoreIndexMetric.java
@@ -16,14 +16,26 @@
  */
 package org.apache.solr.metrics.prometheus.core;
 
-import com.codahale.metrics.Gauge;
-import com.codahale.metrics.Metric;
+import com.codahale.metrics.*;
 import org.apache.solr.metrics.prometheus.SolrPrometheusFormatter;
 
 /** Dropwizard metrics of name INDEX.* */
 public class SolrCoreIndexMetric extends SolrCoreMetric {
   public static final String CORE_INDEX_METRICS = "solr_metrics_core_index_size_bytes";
 
+  public static final String CORE_INDEX_FLUSH_METRICS = "solr_metrics_core_index_flush";
+  public static final String CORE_INDEX_MERGE_ERRORS_METRICS = "solr_metrics_core_index_merge_errors";
+
+  public static final String CORE_INDEX_MERGE_METRICS = "solr_metrics_core_index_merges";
+
+  // these are only for major merges with more details enabled
+  public static final String CORE_INDEX_MERGE_DOCS_METRICS = "solr_metrics_core_index_merged_docs";
+  public static final String CORE_INDEX_MERGE_DELETED_DOCS_METRICS = "solr_metrics_core_index_merged_deleted_docs";
+
+  public static final String CORE_INDEX_MERGING_METRICS = "solr_metrics_core_index_merges_running";
+  public static final String CORE_INDEX_MERGING_DOCS_METRICS = "solr_metrics_core_index_merging_docs";
+  public static final String CORE_INDEX_MERGING_SEGMENTS_METRICS = "solr_metrics_core_index_merging_segments";
+
   public SolrCoreIndexMetric(Metric dropwizardMetric, String metricName) {
     super(dropwizardMetric, metricName);
   }
@@ -31,17 +43,65 @@ public SolrCoreIndexMetric(Metric dropwizardMetric, String metricName) {
   /*
    * Metric examples being exported
    * INDEX.sizeInBytes
+   *
+   * INDEX.merge.errors
+   * INDEX.merge.minor
+   * INDEX.merge.minor.running
+   * INDEX.merge.minor.running.docs
+   * INDEX.merge.minor.running.segments
+   * INDEX.merge.major
+   * INDEX.merge.major.docs
+   * INDEX.merge.major.deletedDocs
+   * INDEX.merge.major.running
+   * INDEX.merge.major.running.docs
+   * INDEX.merge.major.running.segments
    */
 
   @Override
   public SolrCoreMetric parseLabels() {
+    String[] parsedMetric = metricName.split("\\.");
+    if (parsedMetric.length < 3) {
+      return this;
+    }
+    if (parsedMetric[1].equals("merge")) {
+      labels.put("type", parsedMetric[2]); // minor / major
+      if (parsedMetric.length > 3) {
+        labels.put("running", "true");
+      } else {
+        labels.put("running", "false");
+      }
+    }
     return this;
   }
 
   @Override
   public void toPrometheus(SolrPrometheusFormatter formatter) {
-    if (metricName.endsWith("sizeInBytes")) {
-      formatter.exportGauge(CORE_INDEX_METRICS, (Gauge<?>) dropwizardMetric, getLabels());
+    if (dropwizardMetric instanceof Gauge) {
+      if (metricName.endsWith("sizeInBytes")) {
+        formatter.exportGauge(CORE_INDEX_METRICS, (Gauge<?>) dropwizardMetric, getLabels());
+      } else if (metricName.endsWith("running")) {
+        formatter.exportGauge(CORE_INDEX_MERGING_METRICS, (Gauge<?>) dropwizardMetric, getLabels());
+      } else if (metricName.endsWith("segments")) {
+        formatter.exportGauge(CORE_INDEX_MERGING_SEGMENTS_METRICS, (Gauge<?>) dropwizardMetric, getLabels());
+      } else if (metricName.endsWith("docs")) {
+        formatter.exportGauge(CORE_INDEX_MERGING_DOCS_METRICS, (Gauge<?>) dropwizardMetric, getLabels());
+      }
+    } else if (dropwizardMetric instanceof Timer) {
+      if (metricName.endsWith("minor") || metricName.endsWith("major")) {
+        formatter.exportTimer(CORE_INDEX_MERGE_METRICS, (Timer) dropwizardMetric, getLabels());
+      }
+    } else if (dropwizardMetric instanceof Counter) {
+      if (metricName.endsWith("errors")) {
+        formatter.exportCounter(CORE_INDEX_MERGE_ERRORS_METRICS, (Counter) dropwizardMetric, getLabels());
+      }
+    } else if (dropwizardMetric instanceof Meter) {
+      if (metricName.endsWith("flush")) {
+        formatter.exportMeter(CORE_INDEX_FLUSH_METRICS, (Meter) dropwizardMetric, getLabels());
+      } else if (metricName.endsWith("docs")) {
+        formatter.exportMeter(CORE_INDEX_MERGE_DOCS_METRICS, (Meter) dropwizardMetric, getLabels());
+      } else if (metricName.endsWith("deletedDocs")) {
+        formatter.exportMeter(CORE_INDEX_MERGE_DELETED_DOCS_METRICS, (Meter) dropwizardMetric, getLabels());
+      }
     }
   }
 }