[Xymon] wrong memory report with free command from procps-ng

[J.C. Cleaver]

On Thu, April 23, 2015 5:26 am, Dominique Frise wrote:
> Hi,
>
>
> Using Xymon 4.3.19, we noticed that all our RHEL 7 systems are reporting
> wrong values.
>
> These systems now use free from procps-ng 3.3.10 whose output has changed.
>
>
> -- free output on RHEL 5/6 ---
>
> [bb at prdexp ~]$ free
>
>              total       used       free     shared    buffers     cached
> Mem:      65916528   63391732    2524796    1376104    1484472   47773272
> -/+ buffers/cache:   14133988   51782540
> Swap:     16777212     180816   16596396
>
>
> --- free output on RHEL 7 ---
>
> [bb at hns ~]$ free
>               total        used        free      shared  buff/cache
> available
> Mem:        8011888      318844     3365516       98788     4327528
> 7275020
> Swap:       8388604           0     8388604
>
>
>
> The "-/+ buffers/cache:" has disappeared, the "used" is now calculated as
> total - free - buffers - cache, and there is an "available" column which
> is an "Estimation of how much memory is available for starting new
> applications, without swapping".
>
> The man page details all that.
>
>
> Dominique
>
> University of Lausanne
>
>


Thanks...

Mind if you could try the following patch? And let me know if it works (it
does for me on an EL7 and Fedora 21).

I went ahead and took the opportunity to begin using the "Available"
figure as the "Actual Used" (well, the Phys - Available figure), since
that's going to be a more realistic figure on kernel's new enough to
support it.


Regards,
-jc
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