Re: [Condor-users] memory usage info

["Leo Cristobal C. Ambolode II" <leo@xxxxxxxxxxxxxxxxxxxxx>]

Hi all,

This is not an answer to carl langlois's inquiry. This is an additional
inquiry about memory usage also. I want o know on how to get the average
memory used and average CPU used by a certain job. I can always get the
EXECUTION TIME (Real Time) of the job from the log (from job submission to
job execution to job termination), but can I include some attributes in my
submit file to also get/(or stream) the average CPU and MEMORY usage of my
program/job? How could I do this?

I'm running condor version 6.8.2 on Scientific Linux 4.3.

Thanks.

Leo

> Actual memory usage is a bit difficult to define
> and also very difficult to get from the OS.  Many
> people use RSS (resident set size), but this
> doesn't really reflect *actual* memory usage due
> to page sharing (who should get the bill for
> glibc?).  Additionally, RSS is not a good measure
> of the memory a program needs, only of what it can
> get  (it may need more, it may need less).
>
> _joe
>
> Ian Chesal wrote:
>>> I was looking at condor_status -direct "host" -long ouput and was
>>> wondering if the current usage in memory is represent somwhere?
>>> I saw TotalMemory, TotalVirtualmemory... but that does not seem to
>>> reflect the actual usage of memory.
>>
>> Condor tracks the memory used by a job under its control in the
>> 'ImageSize' classad variable. There's probably some fascinating ancedote
>> for why it's called ImageSize, but I don't know it.
>>
>> Also, it's not always accurate depending on what you're running and on
>> what OS.
>>
>> - Ian
>>
>>
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