public boolean hasCachedRoughFileInfo(TsFileResource resource) {
    return getRoughFileInfo(resource) != null;
  }
The size of global compaction estimation rough file info cahce.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/selector/estimator/AbstractCompactionEstimator.java