public long getUpdateRateAverageLatency() {
    return updateRateAverageLatency;
  }
Returns the average latency for the update operations on the {@link LuceneIndex}

@return the average latency for the update operations in nanoseconds on the Lucene Index
geode-lucene/src/main/java/org/apache/geode/cache/lucene/management/LuceneIndexMetrics.java