[Bug] Csv import meet error "There are too many timeseries in memory"

### Search before asking

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

### Version

1.0.0

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

Meet this error when import data to iotdb(version: 1.0.0):
"Meet error when insert csv because 507: There are too many timeseries in memory, please increase MAX_HEAP_SIZE in datanode-env.sh/bat, restart and create timeseries again."

Are there any other options or configurations to avoid this as for now i can`t increase memory size of the server? I don't understand why there are so many timeseries in memory, as there are no queries at the moment. If these timeseries in memory are cache of imported data, when will the memory will be released?

### What did you expect to see?

-

### What did you see instead?

-

### Anything else?

_No response_

### Are you willing to submit a PR?

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

首先在 IoTDB 1.0.0 上重现 CSV 导入失败，并检查 datanode-env.sh/bat 中引用的 timeseries-memory 限制。确定导入为何在没有查询的情况下达到该限制，以及内存是否会被释放；完成的标准是记录原因，以及适用于无法增加堆大小的服务器的受支持配置或解决方法。

由索引模型根据 Issue 内容生成。