[Xymon] Solaris 10 swap not showing on memory alert correctly?

[Vernon Everett]

Solaris and swap is tricky to nail down, specifically because different
commands will report different values, by calculating the values in
different ways.
You need to choose your commands carefully, depending on what value you
need to know.

This might help explain things.
http://www.f3partners.com/blog/bid/49584/Solaris-Swap-Q-A

It all becomes rather fuzzy when you consider what ZFS is doing in your
memory.

Also, in a zone, all bets are off.
Caps in particular, on memory or swap, can completely muddy the water.
All the checks within the zone, will show the max available as being the
capped value.
However when you interrogate the kernel for amount free, it returns what
the kernel can see. And the kernel can see everything, because it exists in
the global zone.

Regards
Vernon

P.S. WARNING: Thinking too hard about this can cause your brain to melt. :)



On 27 June 2013 00:38, Gore, David W (David) <david.gore at verizon.com> wrote:

> Wed Jun 26 16:26:48 GMT 2013 - Memory low****
>
>    Memory              Used       Total  Percentage****
>
> yellow Physical          23355M      24576M         95%****
>
> green Swap                106M      35913M          0%****
>
> ** **
>
> From the client data:****
>
> ** **
>
> [swap]****
>
> total: 18459352k bytes allocated + 3036456k reserved = 21495808k used,
> 32308920k available****
>
> ** **
>
> I would expect to see the 21495808k used number?****
>
> ** **
>
> Where is it getting the 106M number?  Anyone else seen this on Solaris?  *
> ***
>
> ** **
>
> ~David****
>
> ** **
>
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