sinkv2(cdc): add more sinkv2 txn sink metrics

[hicqu]

Signed-off-by: qupeng qupeng@pingcap.com

What problem does this PR solve?

Issue Number: ref #5928

What is changed and how it works?

Add more metric panels for transaction sink.

Check List

Tests

• No code

An example can be found here.

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• 3AceShowHand
• hi-rustin

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[codecov-commenter]

Codecov Report

Merging #7214 (6e88751) into master (d8fff7a) will decrease coverage by 0.0448%.
The diff coverage is 72.8813%.

Additional details and impacted files

Flag	Coverage Δ
cdc	67.1772% <79.4520%> (-0.0383%)	⬇️
dm	51.6560% <ø> (-0.1815%)	⬇️
engine	60.9490% <70.7207%> (+0.0909%)	⬆️

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

@@               Coverage Diff                @@
##             master      #7214        +/-   ##
================================================
- Coverage   59.6043%   59.5594%   -0.0449%     
================================================
  Files           790        790                
  Lines         91089      90753       -336     
================================================
- Hits          54293      54052       -241     
+ Misses        32051      31974        -77     
+ Partials       4745       4727        -18     

[Rustin170506]

/cc

[Rustin170506]

Thanks!

[3AceShowHand]

It looks the Output Row Count (per second) is identical to the MySQL sink write rows count/s and Kafka sink write rows count/s, how about renaming it to sink write rows count/s.

[3AceShowHand]

For each panel, please also enable legend/values options, at least current.

[hicqu]

I prefer to keep Output Row Count (per second). Seems it's clear enough.

[Rustin170506]

/merge

[ti-chi-bot]

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

Commit hash: 02804c2