ConeyLiu commented on code in PR #7279:
URL: https://github.com/apache/iceberg/pull/7279#discussion_r1161572794
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parquet/src/main/java/org/apache/iceberg/parquet/VectorizedParquetReader.java:
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@@ -109,11 +117,23 @@ public CloseableIterator<T> iterator() {
private final int batchSize;
private final List<Map<ColumnPath, ColumnChunkMetaData>>
columnChunkMetadata;
private final boolean reuseContainers;
- private int nextRowGroup = 0;
private long nextRowGroupStart = 0;
private long valuesRead = 0;
private T last = null;
private final long[] rowGroupsStartRowPos;
+ private final int totalRowGroups;
+ private static final ExecutorService prefetchService =
+ MoreExecutors.getExitingExecutorService(
+ (ThreadPoolExecutor)
+ Executors.newFixedThreadPool(
+ 4,
Review Comment:
The `ThreadPool` should be shared by all the readers in the process. But the
hard code may need to improve.
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