[VL] Add default compress for VeloxColumnarBatchSerializer to reduce memory usage#12373
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HaoChen-ch wants to merge 4 commits into
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[VL] Add default compress for VeloxColumnarBatchSerializer to reduce memory usage#12373HaoChen-ch wants to merge 4 commits into
HaoChen-ch wants to merge 4 commits into
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Run Gluten Clickhouse CI on x86 |
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This PR adds a new config option, spark.gluten.sql.columnar.backend.velox.columnarBatchSerializerCompression, which enables compression in the VeloxColumnarBatchSerializer. The serializer is used to serialize columnar batches (e.g. for broadcast), and applying compression reduces the serialized size, which lowers broadcast memory usage.
The config defaults to none and supports none, zstd, zlib, snappy, lz4, and gzip.
before
after set spark.gluten.sql.columnar.backend.velox.columnarBatchSerializerCompression=zstd
bytesSize decrease from 1160593862 to 29097045