add region bucket informations in split_check.#8
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tonyxuqqi wants to merge 2 commits intoBusyJay:test-cloud-5.1from
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add region bucket informations in split_check.#8tonyxuqqi wants to merge 2 commits intoBusyJay:test-cloud-5.1from
tonyxuqqi wants to merge 2 commits intoBusyJay:test-cloud-5.1from
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What problem does this PR solve?
improve large range query performance (such as select count(*), analyze table)
Issue Number: close #xxx
Problem Summary:
What is changed and how it works?
This is TiKV part change and all it does is basically update PD the current region buckets based on scan or approximate size. We virtually split the big region into region buckets, each region bucket is about 100MB size (the value is configurable).
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