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criSize meaning #437

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wxybear opened this issue Dec 30, 2021 · 1 comment
Open

criSize meaning #437

wxybear opened this issue Dec 30, 2021 · 1 comment

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@wxybear
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wxybear commented Dec 30, 2021

Hello, I want to know what is the meaning of the criSize variable,
I use csv-writer write data(5 column, about 2KB per row), when I write with pw.Write(or WriteString), common.Sizeof(val) func return 20(because slice has 5 interface, Sizeof(interface) is 4). When write 256MB data, I expected 2 row group. However, there's only one because pw.ObjsSize is smaller than criSize, just flush once when WriteStop.

PageSize: 1M
RowGroup: Default(128M)

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@wxybear
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wxybear commented Dec 30, 2021

there is the meta generated by parquet-tools(java)
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zolstein pushed a commit to zolstein/parquet-go that referenced this issue Jun 23, 2023
support configuring the sorting buffer pool (xitongsys#437)
e24ab55 
* better estimation of the size of decode output buffers

* detect whether some encodings support decoding values in place

* fix page size

* chunk large writes of rows

* support configuring the sorting buffer pool

* rename: PageBufferPool => BufferPool

* let io.Seeker handle negative offsets

* rename: pageBuffer => memoryBuffer
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@wxybear