From 6780e1a24ccdefd3a328abe7ca8cef3d4ed57114 Mon Sep 17 00:00:00 2001
From: Christian Hesse <mail@eworm.de>
Date: Fri, 20 Jan 2023 14:34:18 +0100
Subject: check-health: monitor free RAM
MIME-Version: 1.0
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---- ✂️ ----
🗃️📉️ Health warning: free RAM

The available free RAM on MikroTik is at 18% (47MiB)!
---- ✂️ ----
🗃️📈️ Health recovery: free RAM

The available free RAM on MikroTik increased to 65% (168MiB).
---- ✂️ ----
---
 check-health | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

(limited to 'check-health')

diff --git a/check-health b/check-health
index 3957ad1..55ad8ab 100644
--- a/check-health
+++ b/check-health
@@ -12,6 +12,7 @@
 
 :global CheckHealthCPULoad;
 :global CheckHealthCPULoadNotified;
+:global CheckHealthFreeRAMNotified;
 :global CheckHealthLast;
 :global CheckHealthTemperature;
 :global CheckHealthTemperatureDeviation;
@@ -45,7 +46,9 @@
 
 $ScriptLock $0;
 
-:set CheckHealthCPULoad (($CheckHealthCPULoad * 4 + [ /system/resource/get cpu-load ] * 10) / 5);
+:local Resource [ /system/resource/get ];
+
+:set CheckHealthCPULoad (($CheckHealthCPULoad * 4 + ($Resource->"cpu-load") * 10) / 5);
 :if ($CheckHealthCPULoad > 750 && $CheckHealthCPULoadNotified != true) do={
   $SendNotification2 ({ origin=$0; \
     subject=([ $SymbolForNotification "abacus,chart-increasing" ] . "Health warning: CPU load"); \
@@ -59,6 +62,23 @@ $ScriptLock $0;
   :set CheckHealthCPULoadNotified false;
 }
 
+:local CheckHealthFreeRAM ($Resource->"free-memory" * 100  / $Resource->"total-memory");
+:if ($CheckHealthFreeRAM < 20 && $CheckHealthFreeRAMNotified != true) do={
+  $SendNotification2 ({ origin=$0; \
+    subject=([ $SymbolForNotification "card-file-box,chart-decreasing" ] . "Health warning: free RAM"); \
+    message=("The available free RAM on " . $Identity . " is at " . $CheckHealthFreeRAM . "% (" . \
+    ($Resource->"free-memory" / 1024 / 1024) . "MiB)!") });
+  :set CheckHealthFreeRAMNotified true;
+}
+:if ($CheckHealthFreeRAM > 30 && $CheckHealthFreeRAMNotified = true) do={
+  $SendNotification2 ({ origin=$0; \
+    subject=([ $SymbolForNotification "card-file-box,chart-increasing" ] . "Health recovery: free RAM"); \
+    message=("The available free RAM on " . $Identity . " increased to " . $CheckHealthFreeRAM . "% (" . \
+    ($Resource->"free-memory" / 1024 / 1024) . "MiB).") });
+  :set CheckHealthFreeRAMNotified false;
+}
+
+
 :foreach Voltage in=[ /system/health/find where type="V" ] do={
   :local Name  [ /system/health/get $Voltage name  ];
   :local Value [ /system/health/get $Voltage value ];
-- 
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