synchronized public void insert(long v) {
    buffer[bufferCount] = v;
    bufferCount++;

    count++;

    if (bufferCount == buffer.length) {
      insertBatch();
      compress();
    }
  }
Add a new value from the stream.
@param v the value to insert
hbase-hadoop-compat/src/main/java/org/apache/hadoop/metrics2/util/MetricSampleQuantiles.java