Backup: Inefficient memory usage in the RangeTree, when there are millions of tables. #58587
Description
Bug Report
Please answer these questions before submitting your issue. Thanks!
1. Minimal reproduce step (Required)
When using BR to back up millions of tables and statistics, memory usage becomes excessive. A significant memory spike occurs at the start of the stats dump process.
2. What did you expect to see? (Required)
meaningful memory usage.
3. What did you see instead (Required)
Inefficient memory usage
4. What is your TiDB version? (Required)
v8.5