Update monitor-prometheus-and-grafana-integration.md

[huoyao1125]

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[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the documentation for Prometheus and Grafana integration by providing a minor clarification to the description of a specific storage metric. The change aims to enhance the accuracy and completeness of the metric's explanation for users monitoring TiDB clusters.

Highlights

• Documentation Clarification: Appended " 80%" to the description of the tidbcloud_node_storage_used_bytes metric in the Prometheus and Grafana integration guide to provide additional context.

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Changelog

• tidb-cloud/monitor-prometheus-and-grafana-integration.md
  • Appended ' 80%' to the description of the tidbcloud_node_storage_used_bytes metric.

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[gemini-code-assist]

Code Review

This pull request updates the description of a metric in the Prometheus integration documentation. I've found an area where the clarity can be improved. The added 80% value lacks context, and I've suggested a rephrasing to explain that it's a common alert threshold. This change aligns with the repository style guide's emphasis on clarity for users.

[gemini-code-assist]

The addition of 80% at the end of the description is unclear and lacks context. To improve clarity for users, it's better to explain what this value represents. Assuming it's a recommended alert threshold, the suggested change provides a more descriptive sentence.

Suggested change

| tidbcloud_node_storage_used_bytes | gauge | cluster_name: `<cluster name>`<br/>instance: `tikv-0\|tikv-1…\|tiflash-0\|tiflash-1…`<br/>component: `tikv\|tiflash` | The disk usage, in bytes, for TiKV or TiFlash nodes. This metric primarily represents the logical data size in the storage engine, and excludes filesystem overhead, WAL files, and temporary files. To calculate the actual disk usage rate, use `(capacity - available) / capacity` instead. 80% |

| tidbcloud_node_storage_used_bytes | gauge | cluster_name: `<cluster name>`<br/>instance: `tikv-0\|tikv-1…\|tiflash-0\|tiflash-1…`<br/>component: `tikv\|tiflash` | The disk usage, in bytes, for TiKV or TiFlash nodes. This metric primarily represents the logical data size in the storage engine, and excludes filesystem overhead, WAL files, and temporary files. To calculate the actual disk usage rate, use `(capacity - available) / capacity` instead. A common alert threshold for this rate is 80%. |

References

1. Documentation should be clear, simple, and easy to understand for users. Any part that might confuse a new user should be reworded for clarity. ^(link)