3% - 5% regression in sysbench oltp_point_select

[Yui-Song]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

1. deploy a tidb cluster with 3 tidb + 3 tikv
2. run sysbench oltp_point_select

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

No performance regression

3. What did you see instead (Required)

There is a 3% - 5% regression in sysbench oltp_point_select

description	commit	QPS
master	6efce0	191226
revert pr	8f7dd8	202710
the pr without regression	554a5f	201511

4. What is your TiDB version? (Required)

nightly.

[Yui-Song]

/type performance
/type regression
/sig planner
/assign @qw4990
/severity major

[Yui-Song]

/remove-label may-affects-8.1
/remove-label may-affects-7.5
/remove-label may-affects-7.1
/remove-label may-affects-6.5
/remove-label may-affects-6.1
/remove-label may-affects-5.4