importinto: optimize write ingest step and fix oom

[D3Hunter]

What problem does this PR solve?

Issue Number: ref #47572, close #47643

Problem Summary:

What is changed and how it works?

• add option checkHotspot to allow read each file using single reader.
• adjust concurrency of LoadIngestData depends on number of data-files when we disable checkHotspot, after this, we can have more concurrency to load ingest data.
• send loaded ingestData immediately to reduce memory usage, now we can hold at most 1 DataAndRange per LoadIngestData routine
• adjust WorkerConcurrency for import-into on global-sort based on thread-cnt to avoid oom see external engine oom on loadIngestData #47643
• display total file size in IEC unit
• refine logs

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
  • NOTE: below test all set this:

set global tidb_server_memory_limit_gc_trigger=0.99;
set global tidb_server_memory_limit='88%';

• test a add-index case of 100M rows(sbtest1) using 1 node and global-sort, this pr takes 5 min 30.47 (5 min 38.94 on master). KS3 speed is not that stable, the speed varies a little.
• test import-into of 150G using 1 node and global-sort, this pr takes 26m (45m on master)
• test import-into on 1T 1 node and global-sort, success
• No need to test

  • I checked and no code files have been changed.

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

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[tiprow]

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[codecov]

Codecov Report

Merging #48047 (d1483d8) into master (2b18f64) will increase coverage by 1.2056%.
Report is 2 commits behind head on master.
The diff coverage is 80.9160%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #48047        +/-   ##
================================================
+ Coverage   71.5890%   72.7947%   +1.2056%     
================================================
  Files          1400       1423        +23     
  Lines        405903     412372      +6469     
================================================
+ Hits         290582     300185      +9603     
+ Misses        95511      93283      -2228     
+ Partials      19810      18904       -906     

Flag	Coverage Δ
integration	42.3672% <0.0000%> (?)
unit	71.5999% <80.9160%> (+0.0109%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	53.9874% <ø> (-0.0629%)	⬇️
parser	∅ <ø> (∅)
br	48.6654% <84.8484%> (-4.2266%)	⬇️

[wjhuang2016]

The duration may not be correct. We can ignore the time during sendFn().

[lance6716]

please address existing comments

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lance6716, wjhuang2016

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• OWNERS [lance6716,wjhuang2016]
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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-10-30 07:29:07.487408576 +0000 UTC m=+2851745.074518721: ☑️ agreed by lance6716.
• 2023-10-31 08:34:31.900646246 +0000 UTC m=+2942069.487756391: ☑️ agreed by wjhuang2016.

[wjhuang2016]

/retest

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #48144.