The initialization of the priority queue is too slow when TiDB contains a large number of tables

[lilinghai]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

million tables
restart tidb node

2. What did you expect to see? (Required)

3. What did you see instead (Required)

4. What is your TiDB version? (Required)

Release Version: v8.5.0-alpha-279-g9812d85d0d
Edition: Community
Git Commit Hash: 9812d85
Git Branch: HEAD
UTC Build Time: 2024-12-03 17:04:33
GoVersion: go1.23.3
Race Enabled: false
Check Table Before Drop: false
Store: tikv