stats: refine the row count estimation for outdated stats (#7175)#7185
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/run-all-tests tidb-test=release-2.0 tikv=release-2.0 pd=release-2.0 |
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@coocood PTAL |
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What have you changed? (mandatory)
Cherry pick #7175
What is the type of the changes? (mandatory)
How has this PR been tested? (mandatory)
Unit test.
Does this PR affect documentation (docs/docs-cn) update? (mandatory)
No.
Does this PR affect tidb-ansible update? (mandatory)
No.
Does this PR need to be added to the release notes? (mandatory)
No.
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Benchmark result if necessary (optional)
Add a few positive/negative examples (optional)