jiaqizho commented on code in PR #1364:
URL: https://github.com/apache/cloudberry/pull/1364#discussion_r2419586060
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contrib/pax_storage/src/cpp/storage/pax.cc:
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@@ -280,14 +282,19 @@ void TableWriter::Open() {
// insert tuple into the aux table before inserting any tuples.
cbdb::InsertMicroPartitionPlaceHolder(RelationGetRelid(relation_),
current_blockno_);
+ cur_physical_size_ = 0;
}
void TableWriter::WriteTuple(TupleTableSlot *slot) {
Assert(writer_);
Assert(strategy_);
- // should check split strategy before write tuple
- // otherwise, may got a empty file in the disk
- if (strategy_->ShouldSplit(writer_->PhysicalSize(), num_tuples_)) {
+ // Sampled split check to reduce PhysicalSize() overhead
+ // We first perform a sampled pre-write check to avoid empty files.
+ if ((num_tuples_ % PAX_SPLIT_CHECK_INTERVAL) == 0) {
Review Comment:
should be?
```
if ((num_tuples_ % PAX_SPLIT_CHECK_INTERVAL) == 0) {
cur_physical_size_ = writer_->PhysicalSize();
if (strategy_->ShouldSplit(cur_physical_size_, num_tuples_)) {
...
}
}
```
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