public void close() throws IOException {
        this.recordReader.close();
        LOG.debug("Num events stats({},{},{})",
            numEvents, numEventsFromDisk, numEventsLoaded);
      }
number of events actually loaded in memory
ql/src/java/org/apache/hadoop/hive/ql/io/orc/VectorizedOrcAcidRowBatchReader.java