Excessive PD goroutine growth during large-scale Restore (3M regions)
Open
affects-7.5
component/br
may-affects-6.5
may-affects-7.1
may-affects-7.5
may-affects-8.1
may-affects-8.5
severity/major
type/bug
- Dominant language
- Go
- Stars
- 40.5k
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Description
## Bug Report
Please answer these questions before submitting your issue. Thanks!
### 1. Minimal reproduce step (Required)
Running Restore on a cluster with 3 million regions and 75+ TiKV nodes.
During the ScanRegions phase, the PD server’s goroutine count grows abnormally.
### 2. What did you expect to see? (Required)
PD goroutine count remains stable (e.g., below ~10k) during the restore workflow.
### 3. What did you see instead (Required)
PD goroutine count keeps increasing and eventually reaches ~1 million, causing significant slowdown during the region scanning phase.
### 4. What is your TiDB version? (Required)
v7.5
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Assessment
This issue has not been assessed yet.