[Java] Slow LZ4 compression using java Arrow 12.0.0
- 主要语言
- Java
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- 94
- 派生
- 152
- 平均合并
- 3 天 16 小时
- 30 天内合并 PR
- 11
描述
### Describe the bug, including details regarding any error messages, version, and platform.
500 MB of arrow data took a few hours to compress. A 5GB selection ran for a couple of days and did not complete. The one that did worked fine once it was done and I was able to read it back in and use it. Without compression, data writes out fine in a much shorter time frame for both. Using the following code to set up my writer:
```
ArrowFileWriter writer = new ArrowFileWriter(root, null, Channels.newChannel(fos), new HashMap<>(), IpcOption.DEFAULT, CommonsCompressionFactory.INSTANCE, CompressionUtil.CodecType.LZ4_FRAME));
```
Running code with:
```
java -version
openjdk version "17.0.7" 2023-04-18
OpenJDK Runtime Environment GraalVM CE 22.3.2 (build 17.0.7+7-jvmci-22.3-b18)
OpenJDK 64-Bit Server VM GraalVM CE 22.3.2 (build 17.0.7+7-jvmci-22.3-b18, mixed mode, sharing)
```
### Component(s)
Java
贡献指南
调研方向
首先,使用提供的 Java 和 OpenJDK 版本,通过 ArrowFileWriter、CommonsCompressionFactory 和 CompressionUtil.CodecType.LZ4_FRAME 重现报告的压缩行为。比较报告数据大小下的压缩和未压缩写入时间;当确定 LZ4 运行时间过长的原因并验证问题已解决后,即视为完成。
由索引模型根据 Issue 内容生成。
评估
- 技术栈
- java
- 领域
- performance
- Issue 类型
- 缺陷
- 难度
- 4/5
- 预计耗时
- 3-5 天
- 活跃度
- 停滞
- 描述清晰度
- 需要澄清
- 新手友好度
- 25/100