Hi, I have fixed issue - IOTDB-325 <https://issues.apache.org/jira/browse/IOTDB-325> in this PR: https://github.com/apache/incubator-iotdb/pull/587
This is mainly a code optimization： - Move start time, end time, count in PageHeader and ChunkMetadata into Statistics inside the two - Remove maxTombstoneTime in ChunkHeader - Remove StatisticsForFilter - Simplify the serialize and deserialize of Statistics Thanks, Jialin Qiao
