[GE users] SGE-6.1: User notification - what exactly is "Max vmem"?

Erik Soyez E.Soyez at science-computing.de
Thu Apr 10 15:07:16 BST 2008


Andy and Andy, thanks a lot for the quick reply!

Erik Soyez.


On Thu, 10 Apr 2008, Andy Schwierskott wrote:

> Hi Erik,
>
> it's an absolute value of virtual memory a job needed. It's vir. memory of
> the sum of all processes belonging to a job.
>
> It's retrieved by the execd when it scans in  regular intervals (every few
> seconds) over the process table.
>
> This data might be somewhat misleading if a process had just forked and
> before it exec()'s. Also shared memory segments are counted multiple times
> (the latter would be perhaps solvable in theory, for ther first problem I
> have not a good idea how it could be addressed).
>
> There are various RFE's requesting that SGE reports RSS as well.


On Thu, 10 Apr 2008 Andreas.Haas at Sun.COM wrote:

> Hi Erik,
>
> it's the high-water mark concerning virtual memory consumption summed up
> for all processes of the job.


>> Hi there,
>> 
>> in the documentation I could not find a description of the
>> "Max vmem" value in the user notification email.  Is it
>> "integrated gigabyte seconds" or "max used memory multiplied
>> by number of cpus".... or something else?
>> 
>> ------------------------------------------------------------------------
>> Job 3400 (jobname) Complete
>> User             = user
>> Queue            = queue at hostname
>> Host             = hostname
>> Start Time       = 04/10/2008 11:30:36
>> End Time         = 04/10/2008 13:29:05
>> User Time        = 06:13:17
>> System Time      = 01:07:03
>> Wallclock Time   = 01:58:29
>> CPU              = 07:20:20
>> Max vmem         = 75.554G
>> Exit Status      = 0
>> ------------------------------------------------------------------------


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