perf: merge parquet files #3545
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Load small parquet files into memory to create a merged RecordBatch to be sorted directly instead of using querying DataFusion for the same purpose.
taimingl
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taimingl
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taimingl
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hengfeiyang
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May 20, 2024
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Load small parquet files into memory to create a merged RecordBatch to be sorted directly instead of using querying DataFusion for the same purpose.
Merging 6 parquet files, each with 20 row by 30k columns
Before
openobserve::service::compact::merge: merge_parquet_files took: 35.473
openobserve::service::compact::merge: merge_parquet_files took: 37.249
openobserve::service::compact::merge: merge_parquet_files took: 38.337
openobserve::service::compact::merge: merge_parquet_files took: 38.759
openobserve::service::compact::merge: merge_parquet_files took: 38.920
After
openobserve::service::compact::merge: merge_parquet_files took 3.399
openobserve::service::compact::merge: merge_parquet_files took 3.781
openobserve::service::compact::merge: merge_parquet_files took 4.017
openobserve::service::compact::merge: merge_parquet_files took 4.162
openobserve::service::compact::merge: merge_parquet_files took 4.441