os_mon(7)

💅 os_mon — the OS Monitoring Application, bestie edition ✨

okay so you're here for os_mon(7), the Erlang Application Definition page for the OS Monitoring Application, and honestly? it's giving "your Erlang system's little sister who checks the vibes of the whole machine." 🫶 let's get into it.

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🌸 NAME 🌸

os_mon — the OS Monitoring Application. periodt.

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🎀 DESCRIPTION 🎀

ok so the operating system monitor, OS_Mon, is literally out here providing these services for you:

• cpu_sup — CPU load and utilization supervision (Unix) 🔥
• disksup — Disk supervision (Unix, Windows) 💾
• memsup — Memory supervision (Unix, Windows) 🧠
• os_sup — Interface to OS system messages (Solaris, Windows) 📨

now, the big-brain design choice, and honestly it's iconic: on distributed Erlang systems, trying to use a service at a node where it's not available is not considered an error. like, no drama, no crash, no screaming. and "not available" could mean any of these:

• OS_Mon isn't running there at all
• the service just isn't a thing for that OS
• the service exists but isn't started

instead of exploding, it issues a warning message via error_logger 😭 and returns a dummy value. which dummy value, you ask? that's specified in the man pages for the respective services. iykyk. ✨

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🌈 CONFIGURATION 🌈

when OS_Mon starts up, by default all the services available for your OS get automatically started — except os_sup, which is the shy one and stays off. 🙈

you can change all of that with these application configuration parameters:

• start_cpu_sup = bool() — Specifies if cpu_sup should be started. Defaults to true. 💖
• start_disksup = bool() — Specifies if disksup should be started. Defaults to true. 💖
• start_memsup = bool() — Specifies if memsup should be started. Defaults to true. 💖
• start_os_sup = bool() — Specifies if os_sup should be started. Defaults to false. 💤

config parameters that affect the different OS_Mon services? those live in the respective man pages, so go read those bestie, i'm not about to steal their moment. 👑

also!! for info about how to change the value of configuration parameters, go see config(5). no cap. 🦋

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⭐ SEE ALSO ⭐

• cpu_sup(3erl)
• disksup(3erl)
• memsup(3erl)
• os_sup(3erl)
• nteventlog(3erl)
• snmp(3erl)

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and that's the whole page, no crumbs left. 💅 this absolute banger of a manual page was brought to you by Ericsson AB, from os_mon version 2.8.2, and it's filed under os_mon(7). slay, go monitor some operating systems. 👑✨