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# Applications


<img src="https://netdata.cloud/img/applications.svg" width="150"/>


Plugin: apps.plugin
Module: apps

<img src="https://img.shields.io/badge/maintained%20by-Netdata-%2300ab44" />

## Overview

Monitor Applications for optimal software performance and resource usage.



This collector is supported on all platforms.

This collector supports collecting metrics from multiple instances of this integration, including remote instances.


### Default Behavior

#### Auto-Detection

This integration doesn't support auto-detection.

#### Limits

The default configuration for this integration does not impose any limits on data collection.

#### Performance Impact

The default configuration for this integration is not expected to impose a significant performance impact on the system.

## Setup


### Prerequisites

No action required.

### Configuration

#### Options



There are no configuration options.



#### via File

There is no configuration file.

##### Examples
There are no configuration examples.



## Alerts

There are no alerts configured by default for this integration.



## Metrics

Metrics grouped by *scope*.

The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.




### Per applications group

These metrics refer to the application group.

Labels:

| Label      | Description     |
|:-----------|:----------------|
| app_group | The name of the group defined in the configuration. |

Metrics:

| Metric | Description | Dimensions | Unit |
|:------|:------------|:----------|:----|
| app.cpu_utilization | Apps CPU utilization (100% = 1 core) | user, system | percentage |
| app.cpu_guest_utilization | Apps CPU guest utilization (100% = 1 core) | guest | percentage |
| app.cpu_context_switches | Apps CPU context switches | voluntary, involuntary | switches/s |
| app.estimated_mem_usage | Apps estimated memory usage (RSS with shared scaling). Requires kernel 4.14+. Enabled by default, disable with --pss 0. | mem | MiB |
| app.mem_usage | Apps memory RSS usage | rss | MiB |
| app.mem_private_usage | Apps memory usage without shared | mem | MiB |
| app.vmem_usage | Apps virtual memory size | vmem | MiB |
| app.mem_page_faults | Apps memory page faults | minor, major | pgfaults/s |
| app.ebpf_cachestat_hit_ratio | Hit ratio | ratio | % |
| app.ebpf_cachestat_dirty_pages | Number of dirty pages | pages | page/s |
| app.ebpf_cachestat_access | Number of accessed files | hits | hits/s |
| app.ebpf_cachestat_misses | Files out of page cache | misses | misses/s |
| app.swap_usage | Apps swap usage | swap | MiB |
| app.disk_physical_io | Apps disk physical IO | reads, writes | KiB/s |
| app.disk_logical_io | Apps disk logical IO | reads, writes | KiB/s |
| app.processes | Apps processes | processes | processes |
| app.threads | Apps threads | threads | threads |
| app.fds_open_limit | Apps open file descriptors limit | limit | percentage |
| app.fds_open | Apps open file descriptors | files, sockets, pipes, inotifies, event, timer, signal, eventpolls, other | fds |
| app.uptime | Apps uptime | uptime | seconds |
| app.uptime_summary | Apps uptime summary | min, avg, max | seconds |


### Per apps plugin IPC

apps.plugin netipc lookup-client and lookup-server health and latency.

This scope has no labels.

Metrics:

| Metric | Description | Dimensions | Unit |
|:------|:------------|:----------|:----|
| netdata.collector.ipc.cgroups_lookup.client.requests | CGROUPS_LOOKUP client request outcomes | requests_sent, requests_responded, requests_timeout, requests_error | requests/s |
| netdata.collector.ipc.cgroups_lookup.client.cache | CGROUPS_LOOKUP client cache outcomes | cache_hits, cache_misses_retry, cache_misses_permanent, cache_evictions | events/s |
| netdata.collector.ipc.cgroups_lookup.client.peer | CGROUPS_LOOKUP client peer connection events | peer_connect_attempts, peer_disconnects | events/s |
| netdata.collector.ipc.cgroups_lookup.client.request_duration_ms | CGROUPS_LOOKUP client request duration buckets | le_1ms, le_5ms, le_10ms, le_50ms, le_100ms, le_500ms, le_1000ms, gt_1000ms | requests/s |
| netdata.collector.ipc.cgroups_lookup.client.queue_depth | CGROUPS_LOOKUP client queued cgroup paths | queue_depth | paths |
| netdata.collector.ipc.apps_lookup.server.requests | APPS_LOOKUP server request outcomes | requests_responded, requests_error | requests/s |
| netdata.collector.ipc.apps_lookup.server.request_duration_ms | APPS_LOOKUP server request duration buckets | le_1ms, le_5ms, le_10ms, le_50ms, le_100ms, le_500ms, le_1000ms, gt_1000ms | requests/s |
