Feat: ReplSet and Cluster data sizes

[fabio-silva]

PMM-13306

Using mongodb_dbstats_dataSize and mongodb_dbstats_indexSize to calculate metrics.
@igroene Please let us know if this sounds accurate or if there's a better way, as I'm no expert at this.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 43.50%. Comparing base (f8c05c8) to head (d5a1da1).

Additional details and impacted files

@@            Coverage Diff             @@
##               v3    #5416      +/-   ##
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- Coverage   43.53%   43.50%   -0.03%     
==========================================
  Files         413      543     +130     
  Lines       42943    45115    +2172     
  Branches        0      590     +590     
==========================================
+ Hits        18694    19626     +932     
- Misses      22376    23552    +1176     
- Partials     1873     1937      +64     

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admin	34.78% <ø> (ø)
unittests	41.31% <ø> (?)

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[Copilot]

Pull request overview

Adds “Total Data Size” visibility to MongoDB ReplSet and Cluster Summary dashboards (and corresponding docs) by calculating total logical size from MongoDB exporter dbstats metrics.

Changes:

• Add new “Total Data Size” stat panel and “Data Size Over Time” timeseries panel to ReplSet Summary.
• Add new “Total Data Size” stat panel and “Data Size Over Time” timeseries panel to Cluster Summary.
• Document the new panels and their dependency on enabling the exporter dbstats collector.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 9 comments.

File	Description
documentation/docs/reference/dashboards/dashboard-mongodb-replset-summary.md	Documents new ReplSet “Total Data Size” panel and requirements.
documentation/docs/reference/dashboards/dashboard-mongodb-cluster-summary.md	Documents new Cluster “Total Data Size” panel and requirements.
dashboards/dashboards/MongoDB/MongoDB_ReplSet_Summary.json	Adds new data size panels; adjusts layout; updates rs_nm templating behavior and some dashboard links.
dashboards/dashboards/MongoDB/MongoDB_Cluster_Summary.json	Adds new data size panels; adjusts layout; updates some dashboard links.

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 6 comments.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

[matejkubinec]

@catalinaadam I think we should be using Sentence case here (and other places legends/panel titles/etc.) right?

[fabio-silva]

I just checked and both dashboards use Title Case in their panels, e.g.:

• Memory Used
• Disk Space Utilization
• Oplog Recovery Window
• Oplog Processing Time
• ...

Same happens in other dashboards across Mongo, MySQL and PG

[matejkubinec]

I think at the moment yes, but I think we wanted to move more into using Sentence case if I remember (there's a google doc with some recomendations)

[catalinaadam]

@matejkubinec, indeed sentence case is the standard we want to move to. However, changing just these two panels while all other panels on these dashboards still use title case would create inconsistency within the same dashboard. Can we standardize capitalization across all panels as part of PMM-14999?

[catalinaadam]

Added release notes with dd85f68

[catalinaadam]

@matejkubinec, indeed sentence case is the standard we want to move to. However, changing just these two panels while all other panels on these dashboards still use title case would create inconsistency within the same dashboard. Can we standardize capitalization across all panels as part of PMM-14999?