Bug Report

What did you do?

Just run upgrade when run workload select_random_point , compare the qps after upgrade with the qps before upgrade.

What did you expect to see?

QPS should not drop more than 5%.

What did you see instead?

QPS drop more than 30%.

What version of PD are you using (pd-server -V)?

/ # /pd-server -V
Release Version: v5.5.0-nightly
Edition: Community
Git Commit Hash: 4f5a78a
Git Branch: heads/refs/tags/v5.5.0-nightly
UTC Build Time: 2022-01-23 06:09:51