@Override
  public String toString() {
    return super.toString() + ", ioHitsPerSecond=" + getIOHitsPerSecond() + ", ioTimePerHit="
      + getIOTimePerHit() + ", allocationFailCount=" + getAllocationFailCount();
  }
Class that implements cache metrics for bucket cache.
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/BucketCacheStats.java