tools: improve flow update

[rleungx]

What problem does this PR solve?

Issue Number: Ref #7703.

What is changed and how does it work?

Check List

Tests

• Manual test

After this PR:

Release note

None.

[ti-chi-bot]

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• CabinfeverB

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[lhy1024]

When we use it, we need to note that item of tikv heartbeat is the cumulative, which is used for hotspot determination is the rate.

For example, if the hotKeysUint is 256, the calculated rate is 25.6 for reads and 4.2 for writes, which is lower than the threshold for the hot side, so it won't be treated as a hot region.

[codecov]

Codecov Report

Merging #7791 (91b6383) into master (21ced9a) will decrease coverage by 0.10%.
Report is 1 commits behind head on master.
The diff coverage is 69.56%.

❗ Current head 91b6383 differs from pull request most recent head 2dd5abd. Consider uploading reports for the commit 2dd5abd to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7791      +/-   ##
==========================================
- Coverage   73.55%   73.46%   -0.10%     
==========================================
  Files         432      432              
  Lines       47793    47836      +43     
==========================================
- Hits        35153    35141      -12     
- Misses       9612     9656      +44     
- Partials     3028     3039      +11     

Flag	Coverage Δ
unittests	73.46% <69.56%> (-0.10%)	⬇️

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[CabinfeverB]

Add some tests for API?

[rleungx]

/merge

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@rleungx: /merge in this pull request requires 2 approval(s).

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/merge

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[rleungx]

/merge cancel

[rleungx]

/merge

[ti-chi-bot]

@rleungx: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

You only need to trigger /merge once, and if the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 2dd5abd