[hobbit] Diagnosing client data (vmstat)

[Klomp, H.]

Since the topic of vmstat is alreading started 

I have a system in which de vmstat output is slightly different from the linux expected output. 
Here, the IDLE and WAIT time are switched. Causing Hobbit to think the wait is is very large and the idle time is very
low. 
(see example) 
[vmstat]
procs                      memory      swap          io     system         cpu
 r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy wa id
 2  0 164232  34532  67736  44528    0    1     1     4    8     6  1  0  0  5
 1  0 164232  33000  67604  45072    0    0     1    29  141   126  3  0  0 97

This is on a hardened linux system. 
Is there a known os which also has this way of reporting the vmstat info 

Regards, 

Bert Klomp 

-----Original Message-----
From: Henrik Stoerner [mailto:henrik at hswn.dk] 
Sent: donderdag 30 augustus 2007 17:54
To: hobbit at hswn.dk
Subject: Re: [hobbit] Diagnosing client data (vmstat)

On Thu, Aug 30, 2007 at 11:39:11AM -0400, ye-fee liang wrote:
> Two questions:
> 
> 1. what's the format of [vmstat] ouput that the Hobbit server is expecting? 

Depends on the operating system. Hobbit uses the operating system ID
(usually "uname -s" converted to lowercase) to identify what sequence
the vmstat columns are in, and based on that feeds the data into the
corresponding datasets in the vmstat RRD file.

> The sar command is not available, so I'm substituting with iostat output that
> looks like:
> 
>   [vmstat]
> cpu utilizaton stat using iostat:
> ---------------------------------
> 0 0 0 0 0 0 0 0 0 0 16 1 0 13 0 0 0 100
> 0 0   0 0   0 0 0 0 0 0   0 0 0 0 0 100 0

Won't work, unless you write code in Hobbit to parse it. What operating
system is this ? IRIX, I suppose - it's  the only one where the client uses
"sar" to collect vmstat data.


> 2. on server side, how do we debug/trace when client data have arrived?

Login as the hobbit user and run 

   bbcmd hobbitd_channel --channel=client cat

This will dump the client-data messages that Hobbit receives.


Regards,
Henrik


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