[NBLUG/talk] Top VIRT memory

[gandalf at sonic.net]

That's a good idea. I can probably even dig up some equations for it to 
crunch online. Computer, compute the exact value of PI.


On 2015-11-25 15:39, Steve S. wrote:
> I'd try to track down one of the more-intense MATLAB users, and see if
> you can get them to do some testing with you... specifically, get them
> to run some intense processing under the app, and see if you get any
> changes to your observed behavior.
> 
> On Wed, Nov 25, 2015 at 3:26 PM,  <gandalf at sonic.net> wrote:
>> I've got this one application MATLAB that is grabbing about 30gigs of 
>> VIRT
>> in top. You can watch it build and it generally goes up to 33g or so 
>> and
>> then backs of to 29g. This is on a 126g system. The RES memory is 
>> around
>> 600m and the SHR memory is about 100m. Now at first this was freaking 
>> me
>> out, but today we did some testing and watched the free memory as well 
>> as
>> buffers and cached. There was little movement. So we brought up five
>> instances of the program on different terminals. They all showed 
>> similar
>> memory usage but free memory just dropped down a gig or two.
>> 
>> I've been reading over the descriptions of the top memory and am not 
>> really
>> sure whats going on, but it looks like it's not harmful. Anybody have 
>> any
>> ideas or advice?
>> 
>> 
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