public IMemoryBlock getCompactionMemoryBlock() {
    return compactionMemoryBlock;
  }
Report resetting the mem cost of sg to system. It will be called after flushing, closing and
failed to insert

@param dataRegionInfo database
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/rescon/memory/SystemInfo.java