Merge TiKV master(c8c1ca8b83)

[CalvinNeo]

What problem does this PR solve?

Issue Number: close #xxx

Problem Summary:

Before proxy is 6444536

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

None

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
2 out of 7 committers have signed the CLA.

✅ HuSharp
✅ CalvinNeo
❌ tonyxuqqi
❌ overvenus
❌ BusyJay
❌ you06
❌ nolouch
_{You have signed the CLA already but the status is still pending? Let us recheck it.}