public static String toString(BloomFilterChunk bloomFilter) {
    return formatStats(bloomFilter) + STATS_RECORD_SEP + "Actual error rate: "
      + String.format("%.8f", bloomFilter.actualErrorRate());
  }
A human-readable string with statistics for the given Bloom filter.
@param bloomFilter the Bloom filter to output statistics for;
@return a string consisting of "&lt;key&gt;: &lt;value&gt;" parts separated by
        {@link #STATS_RECORD_SEP}.
hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilterUtil.java