default long getMinTime() {
    return Long.MIN_VALUE;
  }
served for flush requests. The logic is just same as getSortedTVListForQuery, but without add
reference count

<p>This interface should be synchronized for concurrent with getSortedTvListForQuery
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/memtable/IWritableMemChunk.java