SV: [xymon] Xymon reports excessive memory usage on 1 SLES 11 host

[Tim McCloskey]

What does the Solaris client use to get this data?  vmstat?
(free is not a native solaris tool).

________________________________________
From: Henrik Størner [henrik at hswn.dk]
Sent: Tuesday, December 14, 2010 1:29 PM
To: xymon at xymon.com
Subject: Re: SV: [xymon] Xymon reports excessive memory usage on 1 SLES 11 host

On Tue, 14 Dec 2010 11:16:20 +0100, Carl Melgaard wrote:

>> Could you show me the client data behind this report? Assuming you have
>> the "hostdata" task running, it should be available from the historical
>> status log via the "Client data available" link near the bottom of the
>> page.
>>
>> It is the "[free]" section that is interesting for the memory report.
>
> Here are two separate [free] sections (from history), that resulted in
> red alerts:
>
> [free]
>              total       used       free     shared    buffers    cached
> Mem:       3921396    3894772      26624          0     302132  3887292
> -/+ buffers/cache: 18014398509187332    4216048
> Swap:     2104472        904    2103568
>
> - and
>
> [free]
>              total       used       free     shared    buffers    cached
> Mem:       3921396    3851576      69820          0     319192  3903296
> -/+ buffers/cache: 18014398509111072    4292308
> Swap:     2104472        904    2103568

I have to plead "not guilty" on behalf of Xymon, then. The data reported
by "free" in the "+/- buffers/cache" line is obviously bogus - but it is
what Xymon uses for the "Actual" memory calculations. If Xymon gets
bogus data, then you will also have bogus results.



Regards,
Henrik

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