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feat: better OS memory metrics #704

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Merged
v0idpwn merged 1 commit into from
Jul 19, 2025
Merged

feat: better OS memory metrics #704

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58 changes: 58 additions & 0 deletions lib/supavisor/monitoring/osmon.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@ defmodule Supavisor.PromEx.Plugins.OsMon do
use PromEx.Plugin
require Logger

@event_memory [:prom_ex, :plugin, :osmon, :memory]
@event_ram_usage [:prom_ex, :plugin, :osmon, :ram_usage]
@event_cpu_util [:prom_ex, :plugin, :osmon, :cpu_util]
@event_cpu_la [:prom_ex, :plugin, :osmon, :cpu_avg1]
Expand All @@ -32,6 +33,48 @@ defmodule Supavisor.PromEx.Plugins.OsMon do
description: "The total percentage usage of operative memory.",
measurement: :ram
),
last_value(
@prefix ++ [:osmon, :memory, :available],
event_name: @event_memory,
description: "The total available memory in the operating system",
unit: :bytes,
measurement: :available
),
last_value(
@prefix ++ [:osmon, :memory, :buffered],
event_name: @event_memory,
description: "The buffered memory in the operating system",
unit: :bytes,
measurement: :buffered
),
last_value(
@prefix ++ [:osmon, :memory, :cached],
event_name: @event_memory,
description: "The cached memory in the operating system",
unit: :bytes,
measurement: :cached
),
last_value(
@prefix ++ [:osmon, :memory, :free],
event_name: @event_memory,
description: "The free memory in the operating system",
unit: :bytes,
measurement: :free
),
last_value(
@prefix ++ [:osmon, :memory, :total],
event_name: @event_memory,
description: "The total memory in the operating system",
unit: :bytes,
measurement: :total
),
last_value(
@prefix ++ [:osmon, :memory, :system_total],
event_name: @event_memory,
description: "The total system memory",
unit: :bytes,
measurement: :system_total
),
last_value(
@prefix ++ [:osmon, :cpu_util],
event_name: @event_cpu_util,
Expand Down Expand Up @@ -62,6 +105,7 @@ defmodule Supavisor.PromEx.Plugins.OsMon do
end

def execute_metrics do
execute_metrics(@event_memory, memory())
execute_metrics(@event_ram_usage, %{ram: ram_usage()})
execute_metrics(@event_cpu_util, %{cpu: cpu_util()})
execute_metrics(@event_cpu_la, cpu_la())
Expand All @@ -77,6 +121,20 @@ defmodule Supavisor.PromEx.Plugins.OsMon do
100 - mem[:free_memory] / mem[:total_memory] * 100
end

@spec memory() :: map()
def memory do
data = :memsup.get_system_memory_data()

%{
available: data[:available_memory],
buffered: data[:buffered_memory],
cached: data[:cached_memory],
free: data[:free_memory],
total: data[:total_memory],
system_total: data[:system_total_memory]
}
end

@spec cpu_la() :: %{avg1: float(), avg5: float(), avg15: float()}
def cpu_la do
%{
Expand Down
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