danny0405 commented on code in PR #18843:
URL: https://github.com/apache/hudi/pull/18843#discussion_r3308110903
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hudi-client/hudi-client-common/src/main/java/org/apache/hudi/io/HoodieAppendHandle.java:
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@@ -247,7 +248,11 @@ private void init(HoodieRecord record) {
deltaWriteStat.setPartitionPath(partitionPath);
deltaWriteStat.setFileId(fileId);
Option<FileSlice> fileSliceOpt =
populateWriteStatAndFetchFileSlice(record, deltaWriteStat);
- averageRecordSize = sizeEstimator.sizeEstimate(record);
+ // averageRecordSize is seeded lazily in flushToDiskIfRequired on the
first buffered
+ // (post-prepareRecord) record. Sizing the incoming record here
under-counts heap
+ // because recordList retains the post-prepareRecord clone: a
fully-materialized Avro
+ // IndexedRecord with prepended meta-fields, whereas the incoming record's
payload
Review Comment:
we can try to serialize the IndexedRecord into avro bytes within the hoodie
record after the meta-fields prepend so that we keep the records in-memory
compact and reduce the gap between the size of the in-memory records and the
actual serialized log block.
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