[Xymon] real memory status

[Galen Johnson]

We did some digging on Linux memory management recently and came to the
conclusion that it's just one big Ponzi Scheme.

=G=

On Fri, Mar 16, 2018 at 1:51 PM, Jason Brockdorf via Xymon <xymon at xymon.com>
wrote:

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> ---------- Forwarded message ----------
> From: Jason Brockdorf <apocalysque at yahoo.com>
> To: "'Kris Springer'" <kspringer at innovateteam.com>, <xymon at xymon.com>
> Cc:
> Bcc:
> Date: Fri, 16 Mar 2018 12:51:10 -0500
> Subject: RE: [Xymon] real memory status
>
> Here's an answer I found googling...
>
>
>
> https://unix.stackexchange.com/questions/147006/real-vs-
> actual-memory-in-xymon-hobbit
>
>
>
> From how I understand it, your system memory will be used by
> services/apps/etc and that usage is referred to as "actual".  The remainder
> of the memory that's not in use for those purposes will be put to use by
> the kernel as buffers/cache.  Basically in Linux (unless you need to tune
> this for some specific reason) you really don't need to as worried about
> "real" memory usage, and the fact that it uses that leftover memory to
> speed up the system is actually a good thing.  As far as xymon works, you
> should be concerned with the "actual" usage (but not *completely* disregard
> real usage).
>
>
>
> I found a really good article one time that explains it.  I'll try to find
> it and send in reply if I can.
>
>
>
> *From:* Xymon [mailto:xymon-bounces at xymon.com] *On Behalf Of *Kris
> Springer
> *Sent:* Friday, March 16, 2018 12:18 PM
> *To:* xymon at xymon.com
> *Subject:* [Xymon] real memory status
>
>
>
> What is the 'Real/Physical' memory status?  It always shows above 95% even
> though my system memory hovers around 30%.  I've read that it's based on
> the results of the 'free' command, but when I manually run that command I
> only get 'Actual' and 'Swap' values.  This 'Real' status doesn't seam
> 'real' at all.  I'm routinely forced to manually ignore that specific
> value's tolerances via the 'analysis.cfg' file, but that seems counter
> productive if the 'Real' status actually means something important.  Can
> anyone advise?
>
>
>
> Thank you.
>
> Kris Springer
>
>
>
>
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