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From Craig L Russell <craig.russ...@oracle.com>
Subject Re: Parsing Olio runtimeStats
Date Wed, 05 May 2010 20:17:14 GMT
Hi Vasileios,

Any chance you can write a patch for this feature request?

Regards,

Craig

On May 5, 2010, at 12:12 PM, Vasileios Kontorinis wrote:

> Akara and Shanti hi,
>     I am parsing the runtimeStats from the driver.log file and I run  
> into this interesting issue.
> In the output for steady state I get "-" for the response time when  
> there are no successful operations since the last time runtimeStats  
> were printed.
> This can happen for two reasons:
> 1) The interval for printing the runtimeStats is small  (in my case  
> 5secs) and some operations, especially the ones that take long and  
> have small frequency in matrix (add event, add user) just never  
> happened.
> 2) There are a bunch of requests going on and none of them is  
> successful. This can happen when there is no sufficient memory in  
> the machine. In that case there is lots of swapping, the cpu goes to  
> 100% utilization and all the operations time-out.
>
> Is there any small change I can do to distinguish between the two  
> cases? Maybe printing a small "t" when there are many requests  
> timing out, so that I can distinguish between the two cases? Any  
> ideas are welcome.
>
> One more thing. I use the variableLoad setting and in order  to know  
> how many users are simulated while the benchmark run, I  parse  
> log.xml looking for "Active threads: ". The problem is that log.xml  
> is big especially when many requests timeout. Is it easy to also log  
> the changes of active threads in the drive.log file ??
>
> Thanks
> P.s. An obvious solution would be to increase the interval. However,  
> We want to make fine-grain decisions in terms of virtual machine  
> resources and we need a small interval.
> -------------------------------------------------------------------
> Kontorinis Vasileios
> Phd student, University of California San Diego
> San Diego, CA 92122
> Cell. phone: (858) 717 6899
> bkontorinis@gmail.com, vkontori@ucsd.edu
> -------------------------------------------------------------------

Craig L Russell
Architect, Oracle
http://db.apache.org/jdo
408 276-5638 mailto:Craig.Russell@oracle.com
P.S. A good JDO? O, Gasp!


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