# Cluster & System Metrics

Furthermore, the software captures replication metrics, overseeing aspects like replication lag, standby server well-being, and synchronization status. 

It also offers insights into background processes,  WAL operations. 

***

System metrics are also collected on a minute-by-minute basis, including details about CPU usage, memory, swap, network activity, I/O operations, and file-system usage.

{% hint style="warning" %}
In the [Agentless](/manual/features/other-features/agentless-monitoring.md) approach, installing the [system\_stats](/manual/getting-started/postgresql-clusters/extensions/system_stats.md) extension is a requirement for gathering system metrics.
{% endhint %}

***

These diverse metrics are presented in a user-friendly web interface, complete with interactive dashboards and comprehensive charts to facilitate thorough analysis.

***

These metrics can also be used for efficient [Data Correlation](/manual/features/tips-and-hints/metric-correlation.md) within your dashboards.

{% content-ref url="/pages/dbLGoTRlMNoFwgFYcbNF" %}
[Metric Correlation](/manual/features/tips-and-hints/metric-correlation.md)
{% endcontent-ref %}

Datasentinel also includes a smart monitoring feature that automatically detects and displays any changes in parameters

{% content-ref url="/pages/fdTllJStuhjrCYoc8BsO" %}
[Changed Parameters](/manual/features/other-features/changed-parameters.md)
{% endcontent-ref %}

### I/O Insights

PostgreSQL 16 introduces an exciting enhancement to database monitoring and performance tuning with the [pg\_stat\_io system view.](https://www.postgresql.org/docs/current/monitoring-stats.html#MONITORING-PG-STAT-IO-VIEW) 

This feature provides detailed insights into the I/O behavior of PostgreSQL servers. A new dashboard has been introduced, starting from version 16, to facilitate a deeper understanding of I/O insights.

{% @arcade/embed flowId="UGcYRRKuwmiHRc65sTAX" url="<https://app.arcade.software/share/UGcYRRKuwmiHRc65sTAX>" %}


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# Agent Instructions: Querying This Documentation

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
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```

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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.