Check swap-usage

Overview

Displays amount of free and used swap space in the system, checks against used swap in percent.

Fact Sheet

Check Plugin Download

https://github.com/Linuxfabrik/monitoring-plugins/tree/main/check-plugins/swap-usage

Check Interval Recommendation

Once a minute

Can be called without parameters

Yes

Compiled for

Linux, Windows

3rd Party Python modules

psutil

Help

usage: swap-usage [-h] [-V] [--always-ok] [-c CRIT] [-w WARN]

Displays amount of free and used swap space in the system, checks against used
swap in percent.

options:
  -h, --help            show this help message and exit
  -V, --version         show program's version number and exit
  --always-ok           Always returns OK.
  -c CRIT, --critical CRIT
                        Set the critical threshold for swap usage (in
                        percent). Default: 90
  -w WARN, --warning WARN
                        Set the warning threshold for swap usage (in percent).
                        Default: 70

Usage Examples

./swap-usage --warning 70 --critical 90

Output:

77.7% - total: 2.0GiB, used: 1.6GiB, free: 456.1MiB
swapped in: 997.6MiB, swapped out: 2.6GiB (both cumulative)

Top3 processes that use the most swap space:
1. php-fpm: 1.6GiB
2. icinga2: 7.7MiB
3. tuned: 3.9MiB

States

  • WARN or CRIT if swap usage is above a given threshold.

Perfdata / Metrics

Name

Type

Description

free

Bytes

Free swap memory in bytes

sin

Bytes

The number of bytes the system has swapped in to disk (cumulative)

sout

Bytes

The number of bytes the system has swapped out to disk (cumulative)

total

Bytes

Total swap memory in bytes

usage_percent

Percentage

The percentage usage calculated as (total - available) / total * 100

used

Bytes

Used swap memory in bytes

Credits, License