[Xymon] "invalid data" shown for swap usage; swap goes Clear (NOT red) and Memory goes Green

[J.C. Cleaver]

On Mon, October 12, 2015 6:20 am, Matt Vander Werf wrote:
> Hello,
>
> We've noticed that when total Swap being used is greater than the total
> Swap on the machine in the memory column/page, Xymon reports back with 0%
> for Swap usage and alongside it, it says, " - invalid data".
>
> We've noticed this happening several times for us and I assume it's due to
> excessive swap usage that causes the memory/swap usage being reported by
> the machine going completely out of wack...
>
> Here's a recent example:
>
>    Memory              Used       Total  Percentage[image: green]
> Physical          10183M      11910M         85%[image: green] Actual
>            9945M      11910M         83%[image: clear] Swap
> 1759218M       3967M          0% - invalid data
>
>
> This is fine and all and it's certainly not Xymon's fault in any way, as
> it's just reporting what the machine is reporting (and the machine is also
> showing wacked out numbers for swap usage).
>
> What I don't care for is that when this happens, the color/state for Swap
> just goes Clear, which causes the memory page/column to just go Green for
> the machine in question. This makes it very hard to know when this kind of
> thing happens and needs to be addressed (usually with a reboot of the
> machine), as it just appears that everything is fine since memory is
> showing Green. Often times, we don't even get any warning of excessive
> swap
> usage with any Yellow or Red alerts prior to this happening as it happens
> so fast on the machine, too fast for Xymon to catch it.
>
> Is it possible to make it so that this kind of situation causes the
> color/state for Swap to go Red, as an indication that something is very
> wrong and needs to be addressed, instead of going Clear? Or at least makes
> it go Yellow?
>
> I'd greatly appreciate this being changed so it at least doesn't show
> Clear! Any other suggestions for how to change this behavior are more then
> welcome!
>
>
> Thanks for the help!!


Hi Matt,

Can you try the patch below? It should upgrade these to a Yellow status
result in this case (and in the parallel event that phys goes over 100%
too)... I think.


Regards,
-jc
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