pkg/metrics: improve the TiDB-Runtime->Memory Usage panel

[XuHuaiyu]

What problem does this PR solve?

Issue Number: ref #55390

Problem Summary:

What changed and how does it work?

This commit improves the TiDB-Runtime->Memory Usage panel to make it more readable.
Before:

After:

According to https://pkg.go.dev/runtime/metrics, we have reorganized the data in the Memory Usage panel into the following categories:

• RSS Memory
• Heap In-Use
• Stack In-Use
• Heap Unused
• Go Runtime Metadata
• Other Memory
• Free Memory Reserved by Go
• Memory Returned to OS

In this structure, rss is approximately equal to heap_inuse + stack_inuse + heap_unused + go_runtime_metadata + other_memory + free_mem_reserved_by_go.

The data sources corresponding to each category are listed in the table below:

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• 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]

Hi @XuHuaiyu. Thanks for your PR.

PRs from untrusted users cannot be marked as trusted with /ok-to-test in this repo meaning untrusted PR authors can never trigger tests themselves. Collaborators can still trigger tests on the PR using /test all.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.0901%. Comparing base (7e9f853) to head (d4b72d6).
Report is 26 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #55391        +/-   ##
================================================
+ Coverage   72.9185%   75.0901%   +2.1716%     
================================================
  Files          1576       1579         +3     
  Lines        440552     446153      +5601     
================================================
+ Hits         321244     335017     +13773     
+ Misses        99560      90929      -8631     
- Partials      19748      20207       +459     

Flag	Coverage Δ
integration	49.9816% <ø> (?)
unit	71.9742% <ø> (+<0.0001%)	⬆️

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

Components	Coverage Δ
dumpling	52.9567% <ø> (ø)
parser	∅ <ø> (∅)
br	52.6912% <ø> (+6.8426%)	⬆️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, wshwsh12

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [hawkingrei,wshwsh12]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-08-13 08:43:43.745581199 +0000 UTC m=+257508.449050836: ☑️ agreed by wshwsh12.
• 2024-08-13 09:36:15.062966934 +0000 UTC m=+260659.766436576: ☑️ agreed by hawkingrei.

[hawkingrei]

/retest