Update monitor-new-relic-integration.md

[huoyao1125]

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[gemini-code-assist]

Summary of Changes

Hello @huoyao1125, 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 focuses on a minor but important documentation update. It corrects a metric name within the New Relic integration guide, ensuring that the listed CPU usage metric accurately reflects the actual metric being reported. This change improves the precision and reliability of the monitoring documentation.

Highlights

• Documentation Update: Corrected the name of a CPU usage metric for TiDB/TiKV/TiFlash nodes in the New Relic integration documentation.

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[gemini-code-assist]

Code Review

This pull request updates a metric name in the New Relic integration documentation. My review focuses on improving technical accuracy and style consistency. I've suggested changing the metric type from count to gauge to accurately reflect that it's a rate, and also recommended enclosing component names in backticks to align with the documentation style guide and improve readability.

[gemini-code-assist]

For technical accuracy, the metric type for tidb_cloud.node_cpu_seconds_total_rate should be gauge instead of count. Since the metric name includes _rate, it represents a rate value, which is typically a gauge type, similar to other rate metrics in this table.¹

Additionally, per the style guide, component names like tidb, tikv, and tiflash should be enclosed in backticks for proper formatting and consistency with other monitoring documents.²

Suggested change

	| tidb_cloud.node_cpu_seconds_total_rate | count | cluster_name: `<cluster name>`<br/><br/>instance: tidb-0\|tidb-1…\|tikv-0…\|tiflash-0…<br/><br/>component: tidb\|tikv\|tiflash | The CPU usage of TiDB/TiKV/TiFlash nodes. |
	| tidb_cloud.node_cpu_seconds_total_rate | gauge | cluster_name: <cluster name><br/><br/>instance: tidb-0|tidb-1…|tikv-0…|tiflash-0…<br/><br/>component: `tidb`|`tikv`|`tiflash` | The CPU usage of TiDB/TiKV/TiFlash nodes. |

Style Guide References

Footnotes

1. Feedback should ensure technical accuracy and terminology consistency. ↩

2. Component names are considered code/options and should be enclosed in backticks. ↩