tune default setting: async_pollers_per_cq (#4359)

[ti-chi-bot]

This is an automated cherry-pick of #4359

Signed-off-by: bestwoody [email protected]

What problem does this PR solve?

Issue Number: close #xxx

Problem Summary:

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

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• bestwoody
• fuzhe1989

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[bestwoody]

LGTM

[windtalker]

LGTM

[bestwoody]

/merge

[ti-chi-bot]

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

/run-all-tests

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[ti-chi-bot]

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

Commit hash: d7b3d45

[sre-bot]

Coverage for changed files

Filename                                                                                        Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
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/home/jenkins/agent/workspace/tiflash-build-common/tiflash/dbms/src/Interpreters/Settings.h           1                 0   100.00%           1                 0   100.00%           1                 0   100.00%           0                 0         -
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                                                                                                 1                 0   100.00%           1                 0   100.00%           1                 0   100.00%           0                 0         -

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
16976      9545             43.77%    191279  96875        49.35%

full coverage report (for internal network access only)

[sre-bot]

Coverage for changed files

Filename                                                                                        Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
/home/jenkins/agent/workspace/tiflash-build-common/tiflash/dbms/src/Interpreters/Settings.h           1                 0   100.00%           1                 0   100.00%           1                 0   100.00%           0                 0         -
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                                                                                                 1                 0   100.00%           1                 0   100.00%           1                 0   100.00%           0                 0         -

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
16976      9545             43.77%    191288  96866        49.36%

full coverage report (for internal network access only)