[Bug] 为什么我的压缩比很低，而且越来越低，现在差不多2.5

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/iotdb/issues) and found nothing similar.

### Version

iotdb 1.2.0

### Describe the bug and provide the minimal reproduce step

编码和压缩方式应该是没有问题，数据量大概目前大概在20亿
![Uploading 微信截图_20240522102315.png…]()
![Uploading 微信截图_20240522102351.png…]()

### What did you expect to see?

怎么降低压缩比呢

### What did you see instead?

无

### Anything else?

_No response_

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

Start by reviewing the IoTDB 1.2.0 compression configuration and the reported behavior with roughly 2 billion data points. The issue names no source file, test, or precise reproduction steps, so first establish a minimal reproducible case and determine why the compression ratio is declining before defining a fix.

Written by the indexing model from the issue text.