[CentOS] High memory needs

Jérémie Dubois-Lacoste jeremie.dl at gmail.com
Thu Sep 27 04:57:51 EDT 2012


We have a computing cluster running Sun Grid Engine, which
considers this value to check if a process exceeds the memory
limit or not. So somehow I'm bound to consider it.

I installed a machine from scratch with CentOS 6.2 x64, nothing
else, I open a terminal, I run this simple bash script and VIRT
goes beyond 100MB for it.
I understand it may not be very precise, however I still don't
understant the difference compared to other x64 ditributions,
under CentOS the value is 7 times higher!




2012/9/27 Gordon Messmer <yinyang at eburg.com>:
> On 09/26/2012 09:14 AM, Jérémie Dubois-Lacoste wrote:
>> 1. Run a python script and check the memory that
>> it requires (field "VIRT" of the "top" command).
>
> Don't use VIRT as a reference for memory used.  RES is a better
> indication, but even that won't tell you anything useful about shared
> memory, and will lead you to believe that a process is using more memory
> than it is.
>
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