---
title: Host health performance metrics
description: The metrics provide the host health performance snapshot within the ServiceNow AI Platform.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/impact/io-host-health-perf-metrics.html
release: australia
topic_type: reference
last_updated: "2026-05-23"
reading_time_minutes: 2
breadcrumb: [Instance monitoring and performance metrics, Monitor instance performance, Platform Health, Using Impact, Impact]
---

# Host health performance metrics

The metrics provide the host health performance snapshot within the ServiceNow AI Platform®.

## Memory

-   **meminfo\_memavailable**

    An estimate of how much memory is available for starting new applications, without swapping.

-   **mem\_total**

    Total usable RAM.

-   **mem\_free**

    The amount of physical RAM, in kilobytes, left unused by the system.

-   **mem\_buffer**

    Relatively temporary storage for raw disk blocks.

-   **mem\_cache**

    In-memory cache for files read from the disk.

-   **mem\_swap**

    Used when the amount of physical memory \(RAM\) is full.


**Parent Topic:**[Instance monitoring and performance metrics](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/impact/instance-observer-ovr-metric.md)

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