renzepost opened a new pull request, #36817:
URL: https://github.com/apache/airflow/pull/36817
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closes: #36793
As mentioned in #36793, a default setting of 1 for `parquet_row_group_size`
leads to quite a few problems. For example the output Parquet files become
huge, the tasks run into OOM issues and the task duration is extended.
I must note that the documentation says that a large number means the worker
needs more memory to execute, while on the contrary I noticed that with 1 row
per row group the tasks get killed with OOM issues very quickly and with a
large number everything seems fine...
I changed it to 100000 based on what other Parquet writers are doing (DuckDB
and Polars), but of course this number is open for debate. @Taragolis suggested
a much lower value between 100 and 1000.
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