Reduce optimizer.max-reordered-joins default to 8 #21360
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Reduces planning time for tpcds/q64 from 11.8s to 6.6s
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Hive partitioned parquet sf1k tpcds/q64 Hive unpartitioned parquet sf1k tpcds/q64 |
sopel39
approved these changes
Apr 3, 2024
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Description
Reduces planning time for tpcds/q64 from 11.8s to 6.6s at sf1k by reducing the default of optimizer.max-reordered-joins to 8 from 9. q64 is the only TPC query affected, it has a different join order but it’s execution was not slowed compared to before.
Further reduction to 7 helps some more with planning time but the plan for q72 becomes worse, so we leave it at 8.
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