Re: {bb} bb-memory + larrd ... does it only graph Physical and not Actual?

[Chris Ricker <kaboom@gatech.edu>]

On Fri, 3 Sep 2004, Charles Jones wrote:

> I have bb-memory.sh (3.0) setup with larrd. Os is RedHat Linux 9, and 
> FC2. All the graphs are showing near 100%, because :
> 
> green Fri Sep 3 10:54:16 MST 2004 - Memory OK
>    Memory    Used    Total    Percentage
>  Physical    994M    1007M    98%
>  Actual    139M    1007M    13%
>  Swap        9M    1027M    0%
> 
> 
> an actual "free" command on the machine in question:
> # free  
>              total       used       free     shared    buffers     cached
> Mem:       1032152    1018236      13916          0      20532     855084
> -/+ buffers/cache:     142620     889532
> Swap:      1052248      10016    1042232
> 
> 
> Graphing the physical value that bb-memory is getting isn't very useful 
> since its always near 100%. 

Linux caches fairly aggressively (the basic assumption being made is that
"free memory is wasted memory"), so just looking at total physical used
versus physical free isn't terribly useful. That's where the Actual line
(139M Used) comes into play.  It subtracts the cache out from the total
used....

later,
chris
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