public AtomicLong getLoadChunkFromCacheCount() {
    return loadChunkFromCacheCount;
  }
Statistic to record the count and time of load timeseries metadata, construct chunk readers and
page reader decompress in the query execution
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/fragment/QueryStatistics.java