Linux Server: Free memory Health Monitor

Jalasoft.Xian.SmartManagementPacks.LinuxServers.FreeMemory.1.1 (AggregateMonitor)

This monitor catches Xian events that notifies when the Free memory has changed its state.

Knowledge Base article:

Summary

Free memory is under threshold.

Available memory is below the minimum threshold configured in Xian Network Manager 2012.

Causes

Memory usage is high and physical memory is possibly inadequate.

Resolutions

Linux kernel operates on the assumption that "free memory is wasted memory", so occasional peaks are not to worry. Determine if you are experiencing higher-than-average activity; caching is an option, but a physical memory upgrade might be required. Verify running processes in your server to find those using large amounts of memory.

Additional

Monitors server free memory and detects when memory resources are below a given threshold.

Element properties:

Target

Jalasoft.Xian.Common.Elements.ThirdParty.Linux.JsXLinuxServerUnixMemoryElement

Parent Monitor

System.Health.PerformanceState

Algorithm

WorstOf

Category

StateCollection

Enabled

True

Alert Generate

True

Alert Severity

MatchMonitorHealth

Alert Priority

Low

Alert Auto Resolve

True

Remotable

True

Accessibility

Public

Alert Message

Free memory Alert

{0}

Source Code:

<AggregateMonitor ID="Jalasoft.Xian.SmartManagementPacks.LinuxServers.FreeMemory.1.1" Accessibility="Public" Enabled="true" Target="ThirdParty_Linux!Jalasoft.Xian.Common.Elements.ThirdParty.Linux.JsXLinuxServerUnixMemoryElement" ParentMonitorID="SystemHealth!System.Health.PerformanceState" Remotable="true" Priority="Normal">

  <Category>StateCollection</Category>

  <AlertSettings AlertMessage="FreeMemory_AlertMessage">

    <AlertOnState>Warning</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Low</AlertPriority>

    <AlertSeverity>MatchMonitorHealth</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Data/Context/Params/Param[3]$</AlertParameter1>

    </AlertParameters>

  </AlertSettings>

  <Algorithm>WorstOf</Algorithm>

</AggregateMonitor>