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Difference between revisions of "Linux monitoring"
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Tomas Kirnak (talk | contribs) (Created page with "==CPU monitoring== ==Memory monitoring== ==Disk monitoring== ==Service/daemon monitoring==") |
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==Intro== | |||
This article assumes that the NetXMS agent is used to monitor the node.<br> | |||
While monitoring using SNMP is absolutely possible, this article does not cover is, as monitoring using the agent is much easier (due to inherent difficulties and particularities of SNMP). | |||
==CPU monitoring== | ==CPU monitoring== | ||
CPU-related agent parameters are located under "System.CPU.*". | |||
Usually, monitoring these should be sufficient: | |||
{| class="wikitable" | |||
|- | |||
| System.CPU.Count || CPU core count | |||
|- | |||
| System.CPU.LoadAvg || 1 minute load average | |||
|- | |||
| System.CPU.Usage || 1 minute percentual utilization | |||
|} | |||
==Memory monitoring== | ==Memory monitoring== | ||
Memory (RAM) related parameters are located under "System.Memory.Physical.*". | |||
You should monitor these: | |||
{| class="wikitable" | |||
|- | |||
| System.Memory.Physical.Total || RAM - size | |||
|- | |||
| System.Memory.Physical.AvailablePerc || Actual free memory percentage (not counting cache) | |||
|- | |||
| System.Memory.Physical.FreePerc || Free memory percentage (counting with cache) | |||
|- | |||
| System.Memory.Physical.Free || Free memory (counting with cache) | |||
|- | |||
| System.Memory.Physical.Available || Actual free memory (not counting cache) | |||
|} | |||
Swap monitoring is also desired. You can find the related parameters under "System.Memory.Swap.*". | |||
Monitoring these is useful: | |||
{| class="wikitable" | |||
|- | |||
| System.Memory.Swap.Total || Swap - size | |||
|- | |||
| System.Memory.Swap.Used || Swap - used | |||
|} | |||
==Disk monitoring== | ==Disk monitoring== | ||
These parameters are under "FileSystem.*". | |||
You probably want at least this: | |||
{| class="wikitable" | |||
|- | |||
| FileSystem.Total("path") || Storage - size of "path" | |||
|- | |||
| FileSystem.UsedPerc("path") || Storage - usage of "path" | |||
|- | |||
| FileSystem.Used("path") || Storage - used on "path" | |||
|} | |||
For each partition/volume that interests you.<br> | |||
Usually, this will be atleast for "/", "/boot", etc. | |||
==Service/daemon monitoring== | ==Service/daemon monitoring== | ||
You can monitor process count and memory usage of individual processes using: | |||
{| class="wikitable" | |||
|- | |||
| Process.Count("name") || Process count of the "name" process | |||
|- | |||
| Process.WkSet("name") || Physical memory used by process "name" | |||
|} | |||