KeyValue size

KeyValue.java

+ 4  // int: Total length of the whole KeyValue.
      + 4  // int: Total length of the key part of the KeyValue.
      + 4  // int: Total length of the value part of the KeyValue.
      + 2                 // short: Row key length.
      + key.length        // The row key.
      + 1                 // byte: Family length.
      + family.length     // The family.
      + qualifier.length  // The qualifier.
      + 8                 // long: The timestamp.
      + 1                 // byte: The type of KeyValue.
      + (value == null ? 0 : value.length);